Bug 1736869 (CVE-2019-12209) - CVE-2019-12209 pam-u2f: insecure debug file handling leads to information disclosure
Summary: CVE-2019-12209 pam-u2f: insecure debug file handling leads to information dis...
Alias: CVE-2019-12209
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1736870
TreeView+ depends on / blocked
Reported: 2019-08-02 08:42 UTC by Marian Rehak
Modified: 2019-08-02 13:18 UTC (History)
1 user (show)

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Last Closed: 2019-08-02 13:18:22 UTC

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Description Marian Rehak 2019-08-02 08:42:23 UTC
Parsing of the configured authfile (default ~/.config/Yubico/u2f_keys) as root, 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.

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Comment 1 Marian Rehak 2019-08-02 08:42:34 UTC
Created pam-u2f tracking bugs for this issue:

Affects: fedora-all [bug 1736870]

Comment 2 Product Security DevOps Team 2019-08-02 13:18:22 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

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