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CVE

CWE

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CVE-2019-12209

Published: Jun 4, 2019

Modified: Aug 4, 2024

PUBLISHED

Description

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3

x_refsource_CONFIRM

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

x_refsource_CONFIRM

[oss-security] 20190605 pam-u2f: CVE-2019-12210: debug_file file descriptor leak, CVE-2019-12209: symlink attack on u2f_keys leading to possible information leak

mailing-list

x_refsource_MLIST

FEDORA-2019-b6d3c8b0a8

vendor-advisory

x_refsource_FEDORA

openSUSE-SU-2019:1708

vendor-advisory

x_refsource_SUSE

openSUSE-SU-2019:1725

vendor-advisory

x_refsource_SUSE

FEDORA-2019-cd8f4b9568

vendor-advisory

x_refsource_FEDORA

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