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Ubuntu Security Notice USN-2651-1
June 22, 2015

patch vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 14.10
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in GNU patch.

Software Description:

• patch: Apply a diff file to an original

Details:

Jakub Wilk discovered that GNU patch did not correctly handle file paths in
patch files. An attacker could specially craft a patch file that could
overwrite arbitrary files with the privileges of the user invoking the program.
This issue only affected Ubuntu 12.04 LTS. (CVE-2010-4651)

Laszlo Boszormenyi discovered that GNU patch did not correctly handle some
patch files. An attacker could specially craft a patch file that could cause a
denial of service. (CVE-2014-9637)

Jakub Wilk discovered that GNU patch did not correctly handle symbolic links in
git style patch files. An attacker could specially craft a patch file that
could overwrite arbitrary files with the privileges of the user invoking the
program. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10.
(CVE-2015-1196)

Jakub Wilk discovered that GNU patch did not correctly handle file renames in
git style patch files. An attacker could specially craft a patch file that
could overwrite arbitrary files with the privileges of the user invoking the
program. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10.
(CVE-2015-1395)

Jakub Wilk discovered the fix for CVE-2015-1196 was incomplete for GNU patch.
An attacker could specially craft a patch file that could overwrite arbitrary
files with the privileges of the user invoking the program. This issue only
affected Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-1396)

Update instructions:

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

Ubuntu 14.10:
patch 2.7.1-5ubuntu0.3

Ubuntu 14.04 LTS:
patch 2.7.1-4ubuntu2.3

Ubuntu 12.04 LTS:
patch 2.6.1-3ubuntu0.1

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

References:
http://www.ubuntu.com/usn/usn-2651-1
CVE-2010-4651, CVE-2014-9637, CVE-2015-1196, CVE-2015-1395,
CVE-2015-1396

Package Information:
https://launchpad.net/ubuntu/+source/patch/2.7.1-5ubuntu0.3
https://launchpad.net/ubuntu/+source/patch/2.7.1-4ubuntu2.3
https://launchpad.net/ubuntu/+source/patch/2.6.1-3ubuntu0.1

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