feat: verify S222 @g5n-dev bounty — NO verdict, claims factually incorrect (#535)

[xliry]

Issue: #204
Submission: #204 (comment)
Author: @g5n-dev

Problem (in our own words)

The submission claims safe_write_text() in file_paths.py has five security vulnerabilities: incorrect file permissions after os.replace(), a TOCTOU race condition, symlink-following in os.replace(), missing content validation, and silent failure. The title references "Unsafe Deserialization" though the function performs no deserialization.

Evidence

• desloppify/base/discovery/file_paths.py:96-105 (at commit 6eb2065): safe_write_text uses mkstemp + os.replace — a standard atomic write pattern.
• Empirical test: os.replace() preserves 0600 permissions from mkstemp, disproving claim 1.
• Empirical test: mkstemp() generates random filenames (e.g. tmp9wtsg0lq.tmp), disproving "predictable location" in claim 2.
• Empirical test: os.replace() replaces symlink entries, does NOT follow them, disproving claim 3 and the attack scenario.
• The except OSError block re-raises after cleanup — failure is not silent, disproving claim 5.

Fix

No fix needed — verdict is NO

Verdict

Question	Answer	Reasoning
Is this poor engineering?	NO	The function implements a correct, standard atomic-write pattern; all five security claims are factually incorrect.
Is this at least somewhat significant?	NO	None of the claimed vulnerabilities exist — permissions are preserved, filenames are random, symlinks are not followed, and exceptions propagate.

Final verdict: NO

Scores

Criterion	Score
Significance	2/10
Originality	3/10
Core Impact	1/10
Overall	2/10

Summary

All five security claims in this submission are factually incorrect, verified empirically. os.replace() preserves mkstemp's 0600 permissions (not umask), mkstemp generates random filenames (not predictable), os.replace() replaces symlink entries rather than following them, and the exception is re-raised (not silent). The function is a well-implemented standard atomic write pattern.

Why Desloppify Missed This

• What should catch: N/A — there is no real issue to catch
• Why not caught: The function is correctly implemented; no detection gap exists
• What could catch: N/A

Verdict Files

• Verdict JSON
• Verdict Report

Generated with Lota