Ubuntu Security Notice USN-2651-1

22nd June, 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)

László Böszörményi 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 version:

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

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2010-4651,

CVE-2014-9637,

CVE-2015-1196,

CVE-2015-1395,

CVE-2015-1396