CVE-2022-31124 — openssh_key_parser is an open source Python package providing utilities to parse

openssh_key_parser is an open source Python package providing utilities to parse and pack OpenSSH private and public key files. In versions prior to 0.0.6 if a field of a key is shorter than it is declared to be, the parser raises an error with a message containing the raw field

01What is this vulnerability?

openssh_key_parser is an open source Python package providing utilities to parse and pack OpenSSH private and public key files. In versions prior to 0.0.6 if a field of a key is shorter than it is declared to be, the parser raises an error with a message containing the raw field value. An attacker able to modify the declared length of a key's sensitive field can thus expose the raw value of that…

02Affected products

Vendor	Product	Versions
scottcwang	openssh_key_parser	< 0.0.6

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-07-06T17:30:27.000Z
• Last modified: 2025-04-22T17:51:53.172Z

09References

• github.com — https://github.com/scottcwang/openssh_key_parser/security/advisories/GHSA-hm37-9…
• github.com — https://github.com/scottcwang/openssh_key_parser/pull/5
• github.com — https://github.com/scottcwang/openssh_key_parser/commit/26e0a471e9fdb23e635bc301…
• github.com — https://github.com/scottcwang/openssh_key_parser/commit/274447f91b4037b7050ae634…
• github.com — https://github.com/scottcwang/openssh_key_parser/commit/d5b53b4b7e76c5b666fc6570…