Vulnerability Details : CVE-2019-12210
Potential exploit
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.
Products affected by CVE-2019-12210
- cpe:2.3:a:yubico:pam-u2f:1.0.7:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-12210
0.31%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-12210
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:N |
8.0
|
4.9
|
NIST | |
|
8.1
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
2.8
|
5.2
|
NIST |
References for CVE-2019-12210
-
https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62
Do not leak file descriptor when doing exec · Yubico/pam-u2f@18b1914 · GitHubPatch;Third Party Advisory
-
https://developers.yubico.com/pam-u2f/Release_Notes.html
Release NotesRelease Notes;Vendor Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html
[security-announce] openSUSE-SU-2019:1708-1: moderate: Security update f
-
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html
[security-announce] openSUSE-SU-2019:1725-1: moderate: Security update f
-
http://www.openwall.com/lists/oss-security/2019/06/05/1
oss-security - pam-u2f: CVE-2019-12210: debug_file file descriptor leak, CVE-2019-12209: symlink attack on u2f_keys leading to possible information leakMailing List;Exploit;Third Party Advisory
Jump to