Debian Long Term Support / LTS Security Information / 2017 / Security Information -- DLA-950-1 libtasn1-3

Debian Security Advisory

DLA-950-1 libtasn1-3 -- LTS security update

Date Reported:

23 May 2017

Affected Packages:

libtasn1-3

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2017-6891.

More information:

Secunia Research has discovered multiple vulnerabilities in GnuTLS libtasn1, which can be exploited by malicious people to compromise a vulnerable system.

Two errors in the "asn1_find_node()" function (lib/parser_aux.c) can be exploited to cause a stacked-based buffer overflow.

Successful exploitation of the vulnerabilities allows execution of arbitrary code but requires tricking a user into processing a specially crafted assignments file by e.g. asn1Coding utility.

For Debian 7 Wheezy, this problem has been fixed in version 2.13-2+deb7u4.

We recommend that you upgrade your libtasn1-3 packages.

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