CVE-2019-12210

high

Description

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.

References

https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62

https://developers.yubico.com/pam-u2f/Release_Notes.html

http://www.openwall.com/lists/oss-security/2019/06/05/1

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html

Details

Source: Mitre, NVD

Published: 2019-06-04

Updated: 2020-08-24

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Severity: High