What’s Vulnerable › Vulnerabilities

CVE-2022-29242: Buffer Overflow on creating key transport blob in GOST Engine

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-24 · updated 2026-06-17
• Weakness: CWE-120

Description

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.

Affected products

• gost-engine engine: before 3.0.1 — fixed in 3.0.1

How to fix

Upgrade to a fixed version: gost-engine engine 3.0.1. Check the vendor advisory for mitigations.

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
• 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

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