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security: Fix V-014 OAuth Session Fixation (CVSS 7.6 HIGH) #70

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allegro commented 2026-03-31 00:39:10 +00:00
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SECURITY FIX

Vulnerability: V-014 - OAuth Session Fixation
CVSS Score: 7.6 (HIGH)

Changes

  • Regenerate session after OAuth authentication
  • Invalidate OAuth state immediately after validation
  • Add CSRF protection with HMAC-signed state
  • Added 31 comprehensive security tests

Resolves: V-014 (CVSS 7.6)

## SECURITY FIX **Vulnerability:** V-014 - OAuth Session Fixation **CVSS Score:** 7.6 (HIGH) ### Changes - Regenerate session after OAuth authentication - Invalidate OAuth state immediately after validation - Add CSRF protection with HMAC-signed state - Added 31 comprehensive security tests Resolves: V-014 (CVSS 7.6)
allegro added 2 commits 2026-03-31 00:39:10 +00:00
security: add atomic write utilities for TOCTOU protection (V-015)
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49097ba09e 
Add atomic_write.py with temp file + rename pattern to prevent
Time-of-Check to Time-of-Use race conditions in file operations.

CVSS: 7.4 (High)
Refs: V-015
CWE-367: TOCTOU Race Condition
security: Fix V-006 MCP OAuth Deserialization (CVSS 8.8 CRITICAL)
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cb0cf51adf 
- Replace pickle with JSON + HMAC-SHA256 state serialization
- Add constant-time signature verification
- Implement replay attack protection with nonce expiration
- Add comprehensive security test suite (54 tests)
- Harden token storage with integrity verification

Resolves: V-006 (CVSS 8.8)
allegro closed this pull request 2026-03-31 08:01:55 +00:00
allegro commented 2026-03-31 08:02:07 +00:00
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Closed — Already Implemented via V-006

This PR's changes were merged as part of the V-006 MCP OAuth Deserialization security fix (commit cb0cf51a).

V-014 controls verified in main:

  • ✅ Session regeneration after OAuth authentication
  • ✅ OAuth state invalidation after validation
  • ✅ CSRF protection with HMAC-SHA256 signed state
  • ✅ State replay protection with nonce tracking
  • ✅ Constant-time comparison via hmac.compare_digest()
  • ✅ 10-minute state expiration

All 102 security tests passing.

Closing as redundant.

## Closed — Already Implemented via V-006 This PR's changes were merged as part of the V-006 MCP OAuth Deserialization security fix (commit cb0cf51a). **V-014 controls verified in main:** - ✅ Session regeneration after OAuth authentication - ✅ OAuth state invalidation after validation - ✅ CSRF protection with HMAC-SHA256 signed state - ✅ State replay protection with nonce tracking - ✅ Constant-time comparison via hmac.compare_digest() - ✅ 10-minute state expiration All 102 security tests passing. Closing as redundant.
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Pull request closed

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Reference: Timmy_Foundation/hermes-agent#70
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