CVE-2022-29242

Buffer Overflow on creating key transport blob in GOST Engine

CVSS 5.9 MEDIUMEPSS 1.6%CWE-120

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.9EPSS 1.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 May 2022Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

GOST engine is a reference implementation of the Russian GOST crypto algorithms for OpenSSL. TLS clients using GOST engine when ciphersuite `TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC` is agreed and the server uses 512 bit GOST secret keys are vulnerable to buffer overflow. GOST engine version 3.0.1 contains a patch for this issue. Disabling ciphersuite `TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC` is a possible workaround.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

gost-engine · engine

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References

https://github.com/gost-engine/engine/commit/7df766124f87768b43b9e8947c5a01e17545772c https://github.com/gost-engine/engine/commit/b2b4d629f100eaee9f5942a106b1ccefe85b8808 https://github.com/gost-engine/engine/commit/c6655a0b620a3e31f085cc906f8073fe81b2fad3 https://github.com/gost-engine/engine/releases/tag/v3.0.1 https://github.com/gost-engine/engine/security/advisories/GHSA-2rmw-8wpg-vgw5