Vulnerability · Published Jul 6, 2022 · Assigned by GitHub_M
CVE-2022-31124Possible leak of key's raw field if declared length is incorrect in openssh_key_parser
High 7.7
In plain English
A high-severity security flaw in openssh_key_parser from scottcwang. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 field. Users are advised to upgrade to version 0.0.6, which no longer includes the raw field value in the error message. There are no known workarounds for this issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | openssh-key-parser | 0.0.6 | GHSA-hm37-9xh2-q499 |
| PyPI | openssh-key-parser | 0.0.6 | PYSEC-2022-233 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| scottcwang | openssh_key_parser | < 0.0.6 |
Weakness: CWE-209 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
References
- https://github.com/scottcwang/openssh_key_parser/security/advisories/GHSA-hm37-9xh2-q499 x_refsource_CONFIRM
- https://github.com/scottcwang/openssh_key_parser/pull/5 x_refsource_MISC
- https://github.com/scottcwang/openssh_key_parser/commit/26e0a471e9fdb23e635bc3014cf4cbd2323a08d3 x_refsource_MISC
- https://github.com/scottcwang/openssh_key_parser/commit/274447f91b4037b7050ae634879b657554523b39 x_refsource_MISC
- https://github.com/scottcwang/openssh_key_parser/commit/d5b53b4b7e76c5b666fc657019dbf864fb04076c x_refsource_MISC