1. Ubuntu Security Notices
  2. USN-3271-1

USN-3271-1: Libxslt vulnerabilities

Publication date

28 April 2017

Overview

Several security issues were fixed in Libxslt.

Releases

Packages

  • libxslt - XSLT processing library

Details

Holger Fuhrmannek discovered an integer overflow in the
xsltAddTextString() function in Libxslt. An attacker could use
this to craft a malicious document that, when opened, could cause a
denial of service (application crash) or possible execute arbitrary
code. (CVE-2017-5029)

Nicolas Gregoire discovered that Libxslt mishandled namespace
nodes. An attacker could use this to craft a malicious document that,
when opened, could cause a denial of service (application crash)
or possibly execute arbtrary code. This issue only affected Ubuntu
16.04 LTS, Ubuntu 14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1683)

Sebastian Apelt discovered that a use-after-error existed in the
xsltDocumentFunctionLoadDocument() function in Libxslt. An attacker
could use this to craft a malicious document that, when opened,
could cause a denial of service (application crash) or...

Holger Fuhrmannek discovered an integer overflow in the
xsltAddTextString() function in Libxslt. An attacker could use
this to craft a malicious document that, when opened, could cause a
denial of service (application crash) or possible execute arbitrary
code. (CVE-2017-5029)

Nicolas Gregoire discovered that Libxslt mishandled namespace
nodes. An attacker could use this to craft a malicious document that,
when opened, could cause a denial of service (application crash)
or possibly execute arbtrary code. This issue only affected Ubuntu
16.04 LTS, Ubuntu 14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1683)

Sebastian Apelt discovered that a use-after-error existed in the
xsltDocumentFunctionLoadDocument() function in Libxslt. An attacker
could use this to craft a malicious document that, when opened,
could cause a denial of service (application crash) or possibly
execute arbitrary code. This issue only affected Ubuntu 16.04 LTS,
Ubuntu 14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1841)

It was discovered that a type confusion error existed in the
xsltStylePreCompute() function in Libxslt. An attacker could use this
to craft a malicious XML file that, when opened, caused a denial of
service (application crash). This issue only affected Ubuntu 14.04
LTS and Ubuntu 12.04 LTS. (CVE-2015-7995)

Nicolas Gregoire discovered the Libxslt mishandled the ‘i’ and ‘a’
format tokens for xsl:number data. An attacker could use this to
craft a malicious document that, when opened, could cause a denial of
service (application crash). This issue only affected Ubuntu 16.04 LTS,
Ubuntu 14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1684)

It was discovered that the xsltFormatNumberConversion() function
in Libxslt did not properly handle empty decimal separators. An
attacker could use this to craft a malicious document that, when
opened, could cause a denial of service (application crash). This
issue only affected Ubuntu 16.10, Ubuntu 16.04 LTS, Ubuntu 14.04 LTS,
and Ubuntu 12.04 LTS. (CVE-2016-4738)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
17.04 zesty libxslt1.1 –  1.1.29-2ubuntu0.1
16.10 yakkety libxslt1.1 –  1.1.29-1ubuntu0.1
16.04 xenial libxslt1.1 –  1.1.28-2.1ubuntu0.1
14.04 trusty libxslt1.1 –  1.1.28-2ubuntu0.1
12.04 precise libxslt1.1 –  1.1.26-8ubuntu1.4

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References

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