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CVE-2019-12210

8.1 · HIGH

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.

Published Jun 4, 2019EPSS 2.06%

Overview

CVE-2019-12210 is a high-severity vulnerability. It was published on June 4, 2019 and has a CVSS 3.0 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

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/18b1914e32b74ff52000f10e97067e841e5fff62Reflists.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/18b1914e32b74ff52000f10e97067e841e5fff62

How CyberStrike helps

Frequently asked questions

What is CVE-2019-12210?

CVE-2019-12210 is a high-severity vulnerability. It was published on June 4, 2019 and has a CVSS 3.0 base score of 8.1 (HIGH).

How severe is CVE-2019-12210?

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-12210?

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-2019-12210?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-12210 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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