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CVE-2019-12209

7.5 · HIGH

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 sy…

Published Jun 4, 2019CWE-59EPSS 2.81%

Overview

CVE-2019-12209 is a high-severity vulnerability. It was published on June 4, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2019-07/msg00012.htmlReflists.opensuse.org/opensuse-security-announce/2019-07/msg00018.htmlRefwww.openwall.com/lists/oss-security/2019/06/05/1Refdevelopers.yubico.com/pam-u2f/Release_Notes.htmlGitHubgithub.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/Reflists.opensuse.org/opensuse-security-announce/2019-07/msg00012.htmlReflists.opensuse.org/opensuse-security-announce/2019-07/msg00018.htmlRefwww.openwall.com/lists/oss-security/2019/06/05/1

How CyberStrike helps

Frequently asked questions

What is CVE-2019-12209?

CVE-2019-12209 is a high-severity vulnerability. It was published on June 4, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2019-12209?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-12209?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-12209?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-12209 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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