Out-of-Bounds Affecting libu2f-host package, versions <1.1.7-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-LIBU2FHOST-336681
- published9 Feb 2019
- disclosed21 Mar 2019
Introduced: 9 Feb 2019
CVE-2018-20340 (opens in a new tab)How to fix?
Upgrade Debian:unstable libu2f-host to version 1.1.7-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libu2f-host package and not the libu2f-host package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.
References
- https://security-tracker.debian.org/tracker/CVE-2018-20340
- https://seclists.org/bugtraq/2019/Feb/23
- https://developers.yubico.com/libu2f-host/Release_Notes.html
- https://www.yubico.com/support/security-advisories/ysa-2019-01/
- https://www.debian.org/security/2019/dsa-4389
- https://security.gentoo.org/glsa/202004-15
- https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-20340