CVE-2019-12209

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.

• CWE-59

• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html
• http://www.openwall.com/lists/oss-security/2019/06/05/1Exploit, Mailing List, Third Party Advisory
• https://developers.yubico.com/pam-u2f/Release_Notes.htmlRelease Notes, Vendor Advisory
• https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html
• http://www.openwall.com/lists/oss-security/2019/06/05/1Exploit, Mailing List, Third Party Advisory
• https://developers.yubico.com/pam-u2f/Release_Notes.htmlRelease Notes, Vendor Advisory
• https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/

Published

Jun 4, 2019

Last Modified

Jun 17, 2026

Status

Modified

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