Detections
Analytics
CVE-2019-12210
high
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.
References
https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62
https://developers.yubico.com/pam-u2f/Release_Notes.html
http://www.openwall.com/lists/oss-security/2019/06/05/1
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html