Debian Security Advisory

DLA-1860-1 libxslt -- LTS security update

Date Reported:

22 Jul 2019

Affected Packages:

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 932321, Bug 932320.
In Mitre's CVE dictionary: CVE-2016-4609, CVE-2016-4610, CVE-2019-13117, CVE-2019-13118.

More information:

Several vulnerabilities were found in libxslt the XSLT 1.0 processing library.

CVE-2016-4610
Invalid memory access leading to DoS at exsltDynMapFunction. libxslt allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors.
CVE-2016-4609
Out-of-bounds read at xmlGetLineNoInternal() libxslt allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors.
CVE-2019-13117
An xsl:number with certain format strings could lead to an uninitialized read in xsltNumberFormatInsertNumbers. This could allow an attacker to discern whether a byte on the stack contains the characters A, a, I, i, or 0, or any other character.
CVE-2019-13118
A type holding grouping characters of an xsl:number instruction was too narrow and an invalid character/length combination could be passed to xsltNumberFormatDecimal, leading to a read of uninitialized stack data.

For Debian 8 Jessie, these problems have been fixed in version 1.1.28-2+deb8u5.

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