fix: resolve newline and semicolon safety filter bypasses#506
fix: resolve newline and semicolon safety filter bypasses#506SaumyaSngh323 wants to merge 4 commits into
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📝 WalkthroughWalkthroughTwo independent changes: a new PATCH endpoint for admin-authenticated profile updates in the API, and expanded regex patterns in the safety validator to detect additional shell injection, command-execution, and data-destruction variants. ChangesProfile Update Endpoint
Enhanced Safety Pattern Detection
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Possibly related issues
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🔍 PR Action RequiredHi @SaumyaSngh323, We detected some items on this Pull Request that require attention: ❌ Merge ConflictsThis branch has merge conflicts with the target branch. Please resolve the conflicts. ❌ Failing CI ChecksThe following check runs or commit statuses are failing (ignoring vercel): Please resolve the issues above to proceed. Last updated: Thu, 04 Jun 2026 12:54:53 GMT |
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Actionable comments posted: 6
🧹 Nitpick comments (2)
backend/app/api/v1/profiles.py (2)
208-212: ⚡ Quick winConsider adding rate limiting for consistency with create endpoint.
The
create_profileendpoint at line 148 appliesgeneral_rate_limitto prevent abuse of admin write operations. For consistency and defense-in-depth, consider applying the same rate limiting to this PATCH endpoint.🔒 Proposed addition: add rate limit dependency
async def update_profile( slug: str, profile_update: ProfileUpdateSchema, db: DB, + _rate_limit: None = Depends(general_rate_limit), _auth: None = Depends(require_admin), ) -> ProfileDetailSchema:🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@backend/app/api/v1/profiles.py` around lines 208 - 212, The PATCH endpoint update_profile should apply the same general_rate_limit dependency as create_profile to protect admin write operations; update the update_profile function signature to accept a new parameter (e.g., _rate_limit: None = Depends(general_rate_limit)) alongside _auth (or next to it) so the rate-limit dependency is enforced, and ensure general_rate_limit is imported where used.
202-210: ⚡ Quick winEnhance API documentation with responses, description, and Path validation.
For consistency with other endpoints in this module, consider adding:
- A
responsesdictionary documenting status codes (201, 401, 404, 422, 503)- A
descriptionparameter explaining partial update semanticsPath(...)validation for theslugparameter with description and examples📝 Proposed enhancement: add complete API documentation
`@router.patch`( "/profiles/{slug}", response_model=ProfileDetailSchema, summary="Partially update an environment profile", + description=( + "Partially update an existing environment profile. Only provided fields " + "will be updated; omitted fields remain unchanged." + ), tags=["Profiles"], + responses={ + 200: {"description": "Profile updated successfully"}, + 401: {"description": "Missing or invalid admin API key"}, + 404: {"description": "Profile not found"}, + 422: {"description": "Request validation error"}, + 503: {"description": "Admin API key not configured on this server"}, + }, ) async def update_profile( - slug: str, + slug: str = Path( + ..., + description="Unique slug of the environment profile to update.", + examples=["pytorch-cu121"], + ), profile_update: ProfileUpdateSchema, db: DB, _auth: None = Depends(require_admin), ) -> ProfileDetailSchema:🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@backend/app/api/v1/profiles.py` around lines 202 - 210, Update the router.patch decorator for update_profile to include a responses dictionary documenting 201, 401, 404, 422, and 503 status codes, add a description explaining that this endpoint performs a partial update (only supplied fields are modified), and validate the slug path parameter by changing the function signature to use Path(...) with a short description and examples; reference the update_profile function and the slug parameter so you add these metadata to the existing decorator (keeping response_model=ProfileDetailSchema and tags=["Profiles"]).
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@backend/app/api/v1/profiles.py`:
- Around line 218-224: The call to profile_service.update_profile can raise DB
exceptions and needs the same try/except handling used in create_profile: wrap
the profile = await profile_service.update_profile(db, slug, profile_update)
call in a try block and catch sqlalchemy.exc.IntegrityError and
sqlalchemy.exc.SQLAlchemyError; on IntegrityError re-raise the same or an
InvalidRequestError with a clear message and on SQLAlchemyError log/raise a
generic server error, then continue to raise EntityNotFoundError when profile is
falsy before returning ProfileDetailSchema.model_validate(profile). Ensure you
reference profile_service.update_profile, EntityNotFoundError, and
ProfileDetailSchema.model_validate when making the changes.
- Around line 202-224: The update_profile endpoint is incorrectly indented
inside the delete_profile function, preventing FastAPI from registering the
route; move the whole async def update_profile(...) block (including the
`@router.patch`(...) decorator and its body that references
profile_service.update_profile and ProfileDetailSchema.model_validate) out to
module-level (dedent so the def starts in column 0) so it is not nested inside
delete_profile and can be registered by the router.
In `@backend/app/templates/safety.py`:
- Line 29: The module crashes at import because invalid regexes in
FORBIDDEN_PATTERNS are compiled into _COMPILED; fix the bad patterns and make
compilation safe: correct the shutdown pattern (replace the invalid
r"shutdown\s+(/[s/r|-h|-r)" with a valid grouping such as a non-capturing
alternation like r"shutdown\s+/(?:s|r|h|-h|-r)" or whatever specific switches
are intended) and fix the PowerShell cradle pattern(s) around the block noted
near lines 67–69 so parentheses and escapes are balanced; after fixing patterns,
either validate them with re.compile locally or move the _COMPILED creation into
a lazy initializer (e.g., a function that compiles on first use) so import-time
compilation cannot raise. Ensure you update references to _COMPILED and the
specific pattern strings in FORBIDDEN_PATTERNS accordingly.
- Line 71: The regex on line containing
r"(?:iex|Invoke-Expression)\s*\|\s*(?:\?s*(?:\(?\:New-Object\)\s+Net\.WebClient\)?)\.(?:DownloadString|DownloadFile))\s*\("
is malformed and only matches cases with a pipe; replace it with a corrected
pattern that allows either a direct call or a piped one and fixes the incorrect
escapes — e.g. use
r"(?:iex|Invoke-Expression)(?:\s*\|\s*)?\s*\(?New-Object\s+Net\.WebClient\)?\.(?:DownloadString|DownloadFile)\s*\("
to match both "iex (New-Object Net.WebClient).DownloadString(...)" and "iex |
(New-Object Net.WebClient).DownloadString(...)" in the safety.py regex list.
- Line 26: The fork‑bomb regex tuple in backend/app/templates/safety.py
currently requires the '|' immediately after '{', so it misses the canonical
payload ":(){:|:&};:". Update that tuple's pattern to allow optional
characters (like ':' or whitespace) between '{' and '|' and to match either '&'
or HTML-escaped '&' before the final ';', and allow optional whitespace
around tokens; in short, replace the existing pattern with one that matches the
canonical payload form (e.g. patterns that permit characters after '{', a '|'
later, and either '&' or '&' before ';') while keeping the same "Fork bomb
pattern" label.
- Line 75: The current regex tuple in safety.py uses the pattern
"base64\s+--decode\s*\|\s*. *sh" which fails to match compact forms like
"--decode|sh" or "--decode| bash" and incorrectly requires an extra
any-character before "sh"; update that tuple's regex to allow an optional
literal dot (to match "./sh" variants), accept no-space compact pipes, and match
both "sh" and "bash" using an optional "ba" and a word boundary so it catches
"sh" and "bash" without overmatching.
---
Nitpick comments:
In `@backend/app/api/v1/profiles.py`:
- Around line 208-212: The PATCH endpoint update_profile should apply the same
general_rate_limit dependency as create_profile to protect admin write
operations; update the update_profile function signature to accept a new
parameter (e.g., _rate_limit: None = Depends(general_rate_limit)) alongside
_auth (or next to it) so the rate-limit dependency is enforced, and ensure
general_rate_limit is imported where used.
- Around line 202-210: Update the router.patch decorator for update_profile to
include a responses dictionary documenting 201, 401, 404, 422, and 503 status
codes, add a description explaining that this endpoint performs a partial update
(only supplied fields are modified), and validate the slug path parameter by
changing the function signature to use Path(...) with a short description and
examples; reference the update_profile function and the slug parameter so you
add these metadata to the existing decorator (keeping
response_model=ProfileDetailSchema and tags=["Profiles"]).
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
⚙️ Run configuration
Configuration used: defaults
Review profile: CHILL
Plan: Pro
Run ID: 3651c274-2625-4a36-9e9f-958a8eaf2daa
📒 Files selected for processing (2)
backend/app/api/v1/profiles.pybackend/app/templates/safety.py
| profile = await profile_service.update_profile(db, slug, profile_update) | ||
| if not profile: | ||
| raise EntityNotFoundError( | ||
| resource=f"Profile '{slug}'", | ||
| error_code="PROFILE_NOT_FOUND", | ||
| ) | ||
| return ProfileDetailSchema.model_validate(profile) |
There was a problem hiding this comment.
Add database error handling to prevent unhandled exceptions.
The profile_service.update_profile call may raise database exceptions (IntegrityError, SQLAlchemyError) that would propagate unhandled. The create_profile endpoint at lines 155-166 demonstrates the proper pattern with try-except blocks for these exceptions.
🛡️ Proposed fix: wrap service call in try-except
logger.info("Admin write: updating profile slug=%s", slug)
- profile = await profile_service.update_profile(db, slug, profile_update)
- if not profile:
- raise EntityNotFoundError(
- resource=f"Profile '{slug}'",
- error_code="PROFILE_NOT_FOUND",
- )
- return ProfileDetailSchema.model_validate(profile)
+ try:
+ profile = await profile_service.update_profile(db, slug, profile_update)
+ if not profile:
+ raise EntityNotFoundError(
+ resource=f"Profile '{slug}'",
+ error_code="PROFILE_NOT_FOUND",
+ )
+ logger.info("Profile updated: slug=%s", slug)
+ return ProfileDetailSchema.model_validate(profile)
+ except IntegrityError as exc:
+ await db.rollback()
+ logger.warning("Integrity error updating profile slug=%s", slug)
+ raise ConflictError(f"Update violates constraints for profile '{slug}'.") from exc
+ except SQLAlchemyError as exc:
+ await db.rollback()
+ logger.exception("Database error while updating profile")
+ raise InternalServerError("Failed to update profile.") from exc📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| profile = await profile_service.update_profile(db, slug, profile_update) | |
| if not profile: | |
| raise EntityNotFoundError( | |
| resource=f"Profile '{slug}'", | |
| error_code="PROFILE_NOT_FOUND", | |
| ) | |
| return ProfileDetailSchema.model_validate(profile) | |
| try: | |
| profile = await profile_service.update_profile(db, slug, profile_update) | |
| if not profile: | |
| raise EntityNotFoundError( | |
| resource=f"Profile '{slug}'", | |
| error_code="PROFILE_NOT_FOUND", | |
| ) | |
| logger.info("Profile updated: slug=%s", slug) | |
| return ProfileDetailSchema.model_validate(profile) | |
| except IntegrityError as exc: | |
| await db.rollback() | |
| logger.warning("Integrity error updating profile slug=%s", slug) | |
| raise ConflictError(f"Update violates constraints for profile '{slug}'.") from exc | |
| except SQLAlchemyError as exc: | |
| await db.rollback() | |
| logger.exception("Database error while updating profile") | |
| raise InternalServerError("Failed to update profile.") from exc |
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@backend/app/api/v1/profiles.py` around lines 218 - 224, The call to
profile_service.update_profile can raise DB exceptions and needs the same
try/except handling used in create_profile: wrap the profile = await
profile_service.update_profile(db, slug, profile_update) call in a try block and
catch sqlalchemy.exc.IntegrityError and sqlalchemy.exc.SQLAlchemyError; on
IntegrityError re-raise the same or an InvalidRequestError with a clear message
and on SQLAlchemyError log/raise a generic server error, then continue to raise
EntityNotFoundError when profile is falsy before returning
ProfileDetailSchema.model_validate(profile). Ensure you reference
profile_service.update_profile, EntityNotFoundError, and
ProfileDetailSchema.model_validate when making the changes.
| (r"dd\s+if=", "Raw disk write command"), | ||
| (r">\s*/dev/sd[a-z]", "Direct disk write"), | ||
| (r"shutdown\s+(/s|/r|-h|-r)", "System shutdown/reboot"), | ||
| (r"shutdown\s+(/[s/r|-h|-r)", "System shutdown/reboot"), |
There was a problem hiding this comment.
🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
python - <<'PY'
import ast, re, pathlib
p = pathlib.Path("backend/app/templates/safety.py")
tree = ast.parse(p.read_text())
patterns = None
for n in tree.body:
if isinstance(n, ast.AnnAssign) and isinstance(n.target, ast.Name) and n.target.id == "FORBIDDEN_PATTERNS":
patterns = n.value.elts
break
if patterns is None:
raise SystemExit("FORBIDDEN_PATTERNS not found")
for i, elt in enumerate(patterns, 1):
pattern = ast.literal_eval(elt.elts[0])
desc = ast.literal_eval(elt.elts[1])
try:
re.compile(pattern, re.IGNORECASE | re.DOTALL)
except re.error as e:
print(f"{i}. {desc}: {e}")
PYRepository: rishabh0510rishabh/EnvForage
Length of output: 230
🏁 Script executed:
#!/bin/bash
set -euo pipefail
# 1) Print relevant portions of the file with line numbers (around the reported line ranges)
echo "=== backend/app/templates/safety.py: lines 1-120 (for mapping) ==="
nl -ba backend/app/templates/safety.py | sed -n '1,120p'
# 2) Enumerate FORBIDDEN_PATTERNS: index, desc, pattern literal, compile status
python3 - <<'PY'
import ast, re, pathlib, textwrap
p = pathlib.Path("backend/app/templates/safety.py")
tree = ast.parse(p.read_text())
patterns = None
for n in tree.body:
if isinstance(n, ast.AnnAssign) and isinstance(n.target, ast.Name) and n.target.id == "FORBIDDEN_PATTERNS":
patterns = n.value.elts
break
if patterns is None:
raise SystemExit("FORBIDDEN_PATTERNS not found")
fails = []
for i, elt in enumerate(patterns, 1):
pattern = ast.literal_eval(elt.elts[0])
desc = ast.literal_eval(elt.elts[1])
try:
re.compile(pattern, re.IGNORECASE | re.DOTALL)
ok = True
err = None
except re.error as e:
ok = False
err = str(e)
fails.append((i, desc, err, pattern))
print(f"{i:02d} | {desc}\n pattern={pattern}\n compile={'OK' if ok else 'FAIL: '+err}\n")
print("\n=== Failures ===")
for i, desc, err, pattern in fails:
print(f"{i}. {desc}: {err}")
# 3) Compile the proposed replacement regexes from the suggested patch
print("\n=== Proposed replacement regex compilation ===")
replacements = {
"shutdown_repl": r"shutdown\s+(?:/(?:s|r)|-(?:h|r))\b",
"powershell_repl": r"(?:iex|Invoke-Expression)\s*\(\s*(?:iwr|Invoke-WebRequest|Invoke-RestMethod|irm|curl|wget)\s+(?!https?://astral\.sh/)\S+.*\)",
}
for name, pat in replacements.items():
try:
re.compile(pat, re.IGNORECASE | re.DOTALL)
print(f"{name}: OK")
except re.error as e:
print(f"{name}: FAIL: {e}")
PYRepository: rishabh0510rishabh/EnvForage
Length of output: 200
🏁 Script executed:
#!/bin/bash
set -euo pipefail
echo "=== backend/app/templates/safety.py: show around FORBIDDEN_PATTERNS ==="
awk 'NR>=1 && NR<=140 {printf "%5d:%s\n", NR, $0}' backend/app/templates/safety.py | sed -n '1,140p'
echo
echo "=== Find exact line ranges containing the failing descriptors ==="
rg -n "System shutdown/reboot|PowerShell malicious download cradle" backend/app/templates/safety.py || true
echo
echo "=== Enumerate FORBIDDEN_PATTERNS: index, desc, pattern, compile status ==="
python3 - <<'PY'
import ast, re, pathlib
p = pathlib.Path("backend/app/templates/safety.py")
tree = ast.parse(p.read_text())
patterns = None
for n in tree.body:
if isinstance(n, ast.AnnAssign) and isinstance(n.target, ast.Name) and n.target.id == "FORBIDDEN_PATTERNS":
patterns = n.value.elts
break
if patterns is None:
raise SystemExit("FORBIDDEN_PATTERNS not found")
fails = []
for i, elt in enumerate(patterns, 1):
pattern = ast.literal_eval(elt.elts[0])
desc = ast.literal_eval(elt.elts[1])
try:
re.compile(pattern, re.IGNORECASE | re.DOTALL)
status = "OK"
except re.error as e:
status = f"FAIL: {e}"
fails.append((i, desc, status, pattern))
print(f"{i:02d} | {desc} | {status}")
print("\nFailures:")
for i, desc, status, pattern in fails:
print(f"{i}. {desc}: {status}\n pattern={pattern}")
PY
echo
echo "=== Compile the proposed replacement regexes ==="
python3 - <<'PY'
import re
repls = [
("shutdown_repl", r"shutdown\s+(?:/(?:s|r)|-(?:h|r))\b"),
("powershell_repl", r"(?:iex|Invoke-Expression)\s*\(\s*(?:iwr|Invoke-WebRequest|Invoke-RestMethod|irm|curl|wget)\s+(?!https?://astral\.sh/)\S+.*\)"),
]
for name, pat in repls:
try:
re.compile(pat, re.IGNORECASE | re.DOTALL)
print(f"{name}: OK")
except re.error as e:
print(f"{name}: FAIL: {e}")
PYRepository: rishabh0510rishabh/EnvForage
Length of output: 6744
Fix import-time re compilation failures in backend/app/templates/safety.py (shutdown + PowerShell cradle).
_COMPILED compiles FORBIDDEN_PATTERNS at import time; currently the module crashes before any safety enforcement:
- Line 34:
r"shutdown\s+(/[s/r|-h|-r)"→re.error: bad character range |-h - Lines 67-69:
PowerShell malicious download cradle→re.error: missing ), unterminated subpattern
Suggested patch
- (r"shutdown\s+(/[s/r|-h|-r)", "System shutdown/reboot"),
+ (r"shutdown\s+(?:/(?:s|r)|-(?:h|r))\b", "System shutdown/reboot"),
@@
- r"(?:iex|Invoke-Expression)\s*\|\s*(?:\?s*(?:iwr|Invoke-WebRequest|Invoke-RestMethod|irm|curl|wget)\s+(?!https?://astral\.sh/)\S+.*"
- r"|Invoke-Expression\s+.*?(?:iex|Invoke-Expression)",
+ r"(?:iex|Invoke-Expression)\s*\(\s*(?:iwr|Invoke-WebRequest|Invoke-RestMethod|irm|curl|wget)\s+(?!https?://astral\.sh/)\S+.*\)",
"PowerShell malicious download cradle",📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| (r"shutdown\s+(/[s/r|-h|-r)", "System shutdown/reboot"), | |
| (r"shutdown\s+(?:/(?:s|r)|-(?:h|r))\b", "System shutdown/reboot"), |
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@backend/app/templates/safety.py` at line 29, The module crashes at import
because invalid regexes in FORBIDDEN_PATTERNS are compiled into _COMPILED; fix
the bad patterns and make compilation safe: correct the shutdown pattern
(replace the invalid r"shutdown\s+(/[s/r|-h|-r)" with a valid grouping such as a
non-capturing alternation like r"shutdown\s+/(?:s|r|h|-h|-r)" or whatever
specific switches are intended) and fix the PowerShell cradle pattern(s) around
the block noted near lines 67–69 so parentheses and escapes are balanced; after
fixing patterns, either validate them with re.compile locally or move the
_COMPILED creation into a lazy initializer (e.g., a function that compiles on
first use) so import-time compilation cannot raise. Ensure you update references
to _COMPILED and the specific pattern strings in FORBIDDEN_PATTERNS accordingly.
| ), | ||
| (r"eval\s+\$\(", "Eval of subshell output"), | ||
| (r"base64\s+--decode\s*\|.*sh", "Base64 decode pipe to shell"), | ||
| (r"base64\s+--decode\s*\|\s*. *sh", "Base64 decode pipe to shell"), |
There was a problem hiding this comment.
🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
python - <<'PY'
import re
pattern = r"base64\s+--decode\s*\|\s*. *sh"
samples = [
"echo ZWNobyBoaQ== | base64 --decode | sh",
"echo ZWNobyBoaQ== | base64 --decode|sh",
]
for s in samples:
print(bool(re.search(pattern, s, re.IGNORECASE | re.DOTALL)), " :: ", s)
PYRepository: rishabh0510rishabh/EnvForage
Length of output: 173
🏁 Script executed:
#!/bin/bash
set -euo pipefail
# Show the relevant snippet around the referenced line
echo "---- backend/app/templates/safety.py (around line 60-90) ----"
nl -ba backend/app/templates/safety.py | sed -n '55,95p'
# Run regex comparisons between current and proposed patterns on multiple samples
echo "---- regex match comparison ----"
python3 - <<'PY'
import re
current = r"base64\s+--decode\s*\|\s*. *sh"
proposed = r"base64\s+--decode\s*\|\s*(?:ba)?sh\b"
samples = [
"echo ZWNoby | base64 --decode | sh",
"echo ZWNoby | base64 --decode|sh",
"echo ZWNoby | base64 --decode |bash",
"echo ZWNoby | base64 --decode| bash",
"echo ZWNoby | base64 --decode | bsh", # odd
"echo ZWNoby | base64 --decode | bash",
"echo ZWNoby | base64 --decode | bash -i",
"echo ZWNoby | BASE64 --DECODE | SH",
"echo ZWNoby | base64 --decode | sh -c 'id'",
"echo ZWNoby | base64 --decode | . sh", # current wildcard intends this
"echo ZWNoby | base64 --decode | .sh", # compact dot
"echo ZWNoby | base64 --decode | . sh", # spaced dot
"echo ZWNoby | base64 --decode | ./sh", # path
"echo ZWNoby | base64 --decode | . ./sh", # odd
"echo ZWNoby | base64 --decode | bash",
]
flags = re.IGNORECASE | re.DOTALL
print(f"{'sample':55} | current | proposed")
print("-"*95)
for s in samples:
c = bool(re.search(current, s, flags))
p = bool(re.search(proposed, s, flags))
# shorten for display
short = (s[:52] + "…") if len(s)>55 else s
print(f"{short:55} | {str(c):7} | {str(p):8}")
PYRepository: rishabh0510rishabh/EnvForage
Length of output: 195
🏁 Script executed:
#!/bin/bash
set -euo pipefail
# Show the relevant snippet around the referenced line
echo "---- backend/app/templates/safety.py (around line 60-90) ----"
nl -ba backend/app/templates/safety.py | sed -n '55,95p'
# Run regex comparisons between current and proposed patterns on multiple samples
echo "---- regex match comparison ----"
python3 - <<'PY'
import re
current = r"base64\s+--decode\s*\|\s*. *sh"
proposed = r"base64\s+--decode\s*\|\s*(?:ba)?sh\b"
samples = [
"echo ZWNoby | base64 --decode | sh",
"echo ZWNoby | base64 --decode|sh",
"echo ZWNoby | base64 --decode |bash",
"echo ZWNoby | base64 --decode| bash",
"echo ZWNoby | base64 --decode | bsh", # odd
"echo ZWNoby | base64 --decode | bash",
"echo ZWNoby | base64 --decode | bash -i",
"echo ZWNoby | BASE64 --DECODE | SH",
"echo ZWNoby | base64 --decode | sh -c 'id'",
"echo ZWNoby | base64 --decode | . sh", # current wildcard intends this
"echo ZWNoby | base64 --decode | .sh", # compact dot
"echo ZWNoby | base64 --decode | . sh", # spaced dot
"echo ZWNoby | base64 --decode | ./sh", # path
"echo ZWNoby | base64 --decode | . ./sh", # odd
"echo ZWNoby | base64 --decode | bash",
]
flags = re.IGNORECASE | re.DOTALL
print(f"{'sample':55} | current | proposed")
print("-"*95)
for s in samples:
c = bool(re.search(current, s, flags))
p = bool(re.search(proposed, s, flags))
short = (s[:52] + "…") if len(s)>55 else s
print(f"{short:55} | {str(c):7} | {str(p):8}")
PYRepository: rishabh0510rishabh/EnvForage
Length of output: 195
🏁 Script executed:
#!/bin/bash
set -euo pipefail
echo "---- file stats ----"
wc -l backend/app/templates/safety.py || true
echo "---- backend/app/templates/safety.py (lines 60-90) ----"
python3 - <<'PY'
path = "backend/app/templates/safety.py"
start, end = 55, 95
with open(path, "r", encoding="utf-8") as f:
lines = f.readlines()
for i in range(start, min(end, len(lines))):
print(f"{i+1:4d}: {lines[i].rstrip()}")
PY
echo "---- regex match comparison (current vs proposed) ----"
python3 - <<'PY'
import re
current = r"base64\s+--decode\s*\|\s*. *sh"
proposed = r"base64\s+--decode\s*\|\s*(?:ba)?sh\b"
samples = [
"echo ZWNoby | base64 --decode | sh",
"echo ZWNoby | base64 --decode|sh",
"echo ZWNoby | base64 --decode |bash",
"echo ZWNoby | base64 --decode| bash",
"echo ZWNoby | base64 --decode | bsh", # odd
"echo ZWNoby | base64 --decode | bash",
"echo ZWNoby | base64 --decode | bash -i",
"echo ZWNoby | BASE64 --DECODE | SH",
"echo ZWNoby | base64 --decode | sh -c 'id'",
"echo ZWNoby | base64 --decode | . sh",
"echo ZWNoby | base64 --decode | .sh",
"echo ZWNoby | base64 --decode | . sh",
"echo ZWNoby | base64 --decode | ./sh",
"echo ZWNoby | base64 --decode | . ./sh",
"echo ZWNoby | base64 --decode | bash",
# additional whitespace edge cases
"echo ZWNoby | base64 --decode |sh",
"echo ZWNoby | base64 --decode\t|sh",
]
flags = re.IGNORECASE | re.DOTALL
print(f"{'sample':70} | current | proposed")
print("-"*125)
for s in samples:
c = bool(re.search(current, s, flags))
p = bool(re.search(proposed, s, flags))
short = (s[:67] + "…") if len(s) > 70 else s
print(f"{short:70} | {str(c):7} | {str(p):9}")
PYRepository: rishabh0510rishabh/EnvForage
Length of output: 3749
🏁 Script executed:
#!/bin/bash
set -euo pipefail
python3 - <<'PY'
import re
current = r"base64\s+--decode\s*\|\s*. *sh"
cand1 = r"base64\s+--decode\s*\|\s*(?:\.\s*)?(?:ba)?sh\b" # preserves `.sh`/`. sh`, fixes `|sh`/`|bash`
cand2 = r"base64\s+--decode\s*\|\s*(?:\.\s*)?(?:ba)?sh\b.*" # sanity (less strict)
samples = [
"echo ZWNoby | base64 --decode | sh",
"echo ZWNoby | base64 --decode|sh",
"echo ZWNoby | base64 --decode |bash",
"echo ZWNoby | base64 --decode| bash",
"echo ZWNoby | base64 --decode | bsh",
"echo ZWNoby | base64 --decode | bash",
"echo ZWNoby | base64 --decode | bash -i",
"echo ZWNoby | BASE64 --DECODE | SH",
"echo ZWNoby | base64 --decode | sh -c 'id'",
"echo ZWNoby | base64 --decode | . sh",
"echo ZWNoby | base64 --decode | .sh",
"echo ZWNoby | base64 --decode | . sh",
"echo ZWNoby | base64 --decode | ./sh",
]
flags = re.IGNORECASE | re.DOTALL
patterns = [("current", current), ("cand1", cand1), ("cand2", cand2)]
print(f"{'sample':75} | current | cand1 | cand2")
print("-"*110)
for s in samples:
row = [s[:72] + "…" if len(s) > 75 else s]
for _, pat in patterns:
row.append(str(bool(re.search(pat, s, flags))).ljust(7))
print(f"{row[0]:75} | " + " | ".join(row[1:]))
PYRepository: rishabh0510rishabh/EnvForage
Length of output: 1663
Fix Base64-to-shell regex to catch compact --decode|sh / --decode|bash without breaking .sh variants.
backend/app/templates/safety.py’s r"base64\s+--decode\s*\|\s*. *sh" misses ... | base64 --decode|sh and ... | base64 --decode| bash-style compact pipes, because it expects a whitespace plus an extra character via . before sh. Replace it with an optional literal dot:
(r"base64\s+--decode\s*\|\s*(?:\.\s*)?(?:ba)?sh\b", "Base64 decode pipe to shell"),🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@backend/app/templates/safety.py` at line 75, The current regex tuple in
safety.py uses the pattern "base64\s+--decode\s*\|\s*. *sh" which fails to match
compact forms like "--decode|sh" or "--decode| bash" and incorrectly requires an
extra any-character before "sh"; update that tuple's regex to allow an optional
literal dot (to match "./sh" variants), accept no-space compact pipes, and match
both "sh" and "bash" using an optional "ba" and a word boundary so it catches
"sh" and "bash" without overmatching.
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Hi @rishabh0510rishabh I have successfully force-pushed the clean single-commit fix and resolved the conflicts. Could you please check the implementation and restore the GSSoC and SSoC labels? Thank you! |
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hey @SaumyaSngh323 please remove merge conflicts and check for backend currently they are failing fix them too |
rishabh0510rishabh
added
level:advanced
gssoc:approved
level3
NSoC'26
and removed
merge-conflict
labels
|
hey @SaumyaSngh323 there are merge conflicts that must be resolved and the backend tests are failing plese fix them |
3 participants
Description
Related Issues
Changes Made
Verification
pytest tests/successfullySafetyFilterDocumentation
docs/FEATURES.md(if adding a feature/profile)CHANGELOG.mdScreenshots (if applicable)
Closes #298
Summary by CodeRabbit
New Features
Chores