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Fencer Intel
high 8.1

CVE-2019-12210 json

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…

published 7y ago modified 4mo ago also EUVD-2019-3855

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

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 misinformation.

Patch / fix

  • pam-u2f Debian 14, Debian 13, Debian 12 1.0.8-1

debian advisories DEBIAN-CVE-2019-12210

  • pam_u2f SLES 12 SP4, SLED 12 SP4, SLE Module for Basesystem 15 SP1 +2 more 1.0.8-3.3.1
  • libu2f-host SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 1.1.6-3.6.1
  • libu2f-host SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 1.1.6-3.5.1

suse advisories SUSE-SU-2019:1750-1SUSE-SU-2019:1749-1

  • pam_u2f openSUSE Tumbleweed 1.1.1-1.3
  • pam_u2f openSUSE Leap 15.0 1.0.8-lp150.7.1
  • libu2f-host openSUSE Leap 15.0 1.1.6-lp150.10.1
  • pam_u2f openSUSE Leap 15.1 1.0.8-lp151.2.3.1
  • libu2f-host openSUSE Leap 15.1 1.1.6-lp151.2.6.1

opensuse advisories openSUSE-SU-2024:11145-1openSUSE-SU-2019:1725-1openSUSE-SU-2019:1708-1

  • pam-u2f Arch Linux 1.0.8-2

arch linux advisories AVG-973

Is CVE-2019-12210 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-12210 updated cvss 8.1

pam-u2f: file descriptor not being closed with debug configuration leads to information disclosure

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.06% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2019/06/05/1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 5.5 AV:N/AC:L/Au:S/C:P/I:P/A:N

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.