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             AUSCERT External Security Bulletin Redistribution

                        libu2f-host security update
                             12 February 2019


        AusCERT Security Bulletin Summary

Product:           libu2f-host
Publisher:         Debian
Operating System:  Debian GNU/Linux 9
                   Linux variants
Impact/Access:     Execute Arbitrary Code/Commands -- Console/Physical
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-20340  

Original Bulletin: 

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running libu2f-host check for an updated version of the software for
         their operating system.

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Debian Security Advisory DSA-4389-1                   security@debian.org
https://www.debian.org/security/                       Sebastien Delafond
February 11, 2019                     https://www.debian.org/security/faq
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Package        : libu2f-host
CVE ID         : CVE-2018-20340
Debian Bug     : 921725

Christian Reitter discovered that libu2f-host, a library implementing
the host-side of the U2F protocol, failed to properly check for a
buffer overflow. This would allow an attacker with a custom made
malicious USB device masquerading as a security key, and physical
access to a computer where PAM U2F or an application with libu2f-host
integrated, to potentially execute arbitrary code on that computer.

For the stable distribution (stretch), this problem has been fixed in
version 1.1.2-2+deb9u1.

We recommend that you upgrade your libu2f-host packages.

For the detailed security status of libu2f-host please refer to
its security tracker page at:

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

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