CVE-2019-12210 — In Yubico pam-u2f 1
In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_file, that file descriptor is not closed when a new process is spawned. This leads to the file descriptor being inherited into the child process; the child process can then read fro
Published
2019-06-04T20:28:51.000Z
Last modified
2024-08-04T23:17:38.208Z
01What is this vulnerability?
In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_file, that file descriptor is not closed when a new process is spawned. This leads to the file descriptor being inherited into the child process; the child process can then read from and write to it. This can leak sensitive information and also, if written to, be used to fill the disk or plant…
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
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: 2019-06-04T20:28:51.000Z
- Last modified: 2024-08-04T23:17:38.208Z
09References
- developers.yubico.com — https://developers.yubico.com/pam-u2f/Release_Notes.html
- github.com — https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff6…
- www.openwall.com — http://www.openwall.com/lists/oss-security/2019/06/05/1
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html
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