Security context
What an agent needs to avoid regressing past fixes and find the next vuln in this repo.
vt-middleware/cryptacular
main @ 6dd0309
4
Fixes
1
CVEs
HIGH
Peak severity
25.0%
Coverage
Highlights
Auth Bypass: 1 prior fix. Scrutinize any change in this area.
CiphertextHeader: most-fixed (1 issue). Treat as high-risk during review.
2 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Auth Bypass: Unauthenticated modification of cryptographic headers allows attackers to alter header parameters before decryption. Version 2 format addresses this by introducing mandatory HMAC-SHA256 signature verification. Additionally, memory exhaustion vulnerabilities (such as CVE-2020-7226) are triggered during untrusted header decoding, underscoring the severity of parsing unauthenticated stream headers.
Cryptographic Issues: Weak nonce generation using time-based values instead of strong entropy sources compromises cipher security, making ciphertext susceptible to replay attacks and predictable keystreams. Replacing them with a properly seeded SecureRandom implementation is critical.
Side-Channel Attack: The use of AESFastEngine exposes the application to cache-timing side-channel attacks (CVE-2016-1000339). Safe implementations must use the constant-time AESEngine to prevent information leakage during cryptographic operations.