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AUSCERT External Security Bulletin Redistribution
ESB-2017.1080
Libxslt vulnerabilities
1 May 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libxslt
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2017-5029 CVE-2016-4738 CVE-2016-1841
CVE-2016-1684 CVE-2016-1683 CVE-2015-7995
Reference: ASB-2017.0024
ESB-2017.0833
ASB-2016.0059
ASB-2016.0036
Original Bulletin:
http://www.ubuntu.com/usn/usn-3271-1
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Ubuntu Security Notice USN-3271-1
April 28, 2017
libxslt vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 17.04
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
- - Ubuntu 12.04 LTS
Summary:
Several security issues were fixed in Libxslt.
Software Description:
- - 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 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:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.04:
libxslt1.1 1.1.29-2ubuntu0.1
Ubuntu 16.10:
libxslt1.1 1.1.29-1ubuntu0.1
Ubuntu 16.04 LTS:
libxslt1.1 1.1.28-2.1ubuntu0.1
Ubuntu 14.04 LTS:
libxslt1.1 1.1.28-2ubuntu0.1
Ubuntu 12.04 LTS:
libxslt1.1 1.1.26-8ubuntu1.4
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-3271-1
CVE-2015-7995, CVE-2016-1683, CVE-2016-1684, CVE-2016-1841,
CVE-2016-4738, CVE-2017-5029
Package Information:
https://launchpad.net/ubuntu/+source/libxslt/1.1.29-2ubuntu0.1
https://launchpad.net/ubuntu/+source/libxslt/1.1.29-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libxslt/1.1.28-2.1ubuntu0.1
https://launchpad.net/ubuntu/+source/libxslt/1.1.28-2ubuntu0.1
https://launchpad.net/ubuntu/+source/libxslt/1.1.26-8ubuntu1.4
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