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...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2019-12209
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1736870
Blocks:
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.

External Reference:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931991

Upstream Commit:

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