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CVE-2019-12209

Published: 4 June 2019

Yubico pam-u2f 1.0.7 attempts parsing of the configured authfile (default $HOME/.config/Yubico/u2f_keys) as root (unless openasuser was enabled), and does not properly verify that the path lacks symlinks pointing to other files on the system owned by root. If the debug option is enabled in the PAM configuration, part of the file contents of a symlink target will be logged, possibly revealing sensitive information.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
pam-u2f
Launchpad, Ubuntu, Debian
bionic Needed

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Not vulnerable
(1.0.8-1)
focal Not vulnerable
(1.0.8-1)
groovy Not vulnerable
(1.0.8-1)
hirsute Not vulnerable
(1.0.8-1)
impish Not vulnerable
(1.0.8-1)
jammy Not vulnerable
(1.0.8-1)
kinetic Not vulnerable
(1.0.8-1)
lunar Not vulnerable
(1.0.8-1)
mantic Not vulnerable
(1.0.8-1)
noble Not vulnerable
(1.0.8-1)
trusty Does not exist

upstream
Released (1.0.8)
xenial Needed

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N