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

> A buffer overflow in the GOST engine allows attackers to execute code or cause denial of service when specific ciphersuites and key sizes are used.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 May 2022
- **Updated:** 23 Apr 2025
- **Also known as:** DEBIAN-CVE-2022-29242, GHSA-2rmw-8wpg-vgw5, UBUNTU-CVE-2022-29242

## What is CVE-2022-29242?

CVE-2022-29242 is a medium-severity memory corruption vulnerability in gost-engine engine, published on 24 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2022-29242?

It affects 1 product.


Products: Gost Engine Project Gost Engine.

## How do I fix CVE-2022-29242?

No fix has been published for CVE-2022-29242 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-29242 being exploited?

There is no known exploitation of CVE-2022-29242 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-29242 and fix it if it is affected.

What it is: CVE-2022-29242 is a medium-severity memory corruption vulnerability in gost-engine engine, published on 24 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-29242 in the wild and no public exploit code.

Affected product: gost-engine engine. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-29242/ (Markdown: https://insights.sbomify.com/CVE-2022-29242/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-29242
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-29242
- OSV: https://osv.dev/vulnerability/CVE-2022-29242

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-29242/
Summaries are generated and may contain mistakes; the official description above is the record.