CVE-2019-12210 Information

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.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html http://www.openwall.com/lists/oss-security/2019/06/05/1 https://developers.yubico.com/pam-u2f/Release_Notes.html https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

8.1