Debian Security Advisory

DLA-1756-1 libxslt -- LTS security update

Date Reported:
15 Apr 2019
Affected Packages:
libxslt
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2019-11068.
More information:

It was discovered that there was an authentication bypass vulnerability in libxslt, a widely-used library for transforming files from XML to other arbitrary format.

The xsltCheckRead and xsltCheckWrite routines permitted access upon receiving an-1 error code and (as xsltCheckRead returned -1 for a specially-crafted URL that is not actually invalid) the attacker was subsequently authenticated.

  • CVE-2019-11068

    libxslt through 1.1.33 allows bypass of a protection mechanism because callers of xsltCheckRead and xsltCheckWrite permit access even upon receiving a -1 error code. xsltCheckRead can return -1 for a crafted URL that is not actually invalid and is subsequently loaded.

For Debian 8 Jessie, these problems have been fixed in version 1.1.28-2+deb8u4.

We recommend that you upgrade your libxslt 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