CVE-2015-1395

Directory traversal vulnerability in GNU patch versions which support Git-style patching before 2.7.3 allows remote attackers to write to arbitrary files with the permissions of the target user via a .. (dot dot) in a diff file name.

Updated patch package fixes security vulnerabilities:

It was reported that a crafted diff file can make patch eat memory and later segfault (CVE-2014-9637).

It was reported that the versions of the patch utility that support Git-style patches are vulnerable to a directory traversal flaw. This could allow an attacker to overwrite arbitrary files by applying a specially crafted patch, with the privileges of the user running patch (CVE-2015-1395).

GNU patch before 2.7.4 allows remote attackers to write to arbitrary files via a symlink attack in a patch file (CVE-2015-1196).

The GNU patch utility was updated to 2.7.5 to fix three security issues and one non-security bug.

The following vulnerabilities were fixed:

• CVE-2015-1196: directory traversal flaw when handling git-style patches. This could allow an attacker to overwrite arbitrary files by tricking the user into applying a specially crafted patch. (bsc#913678)
• CVE-2015-1395: directory traversal flaw when handling patches which rename files. This could allow an attacker to overwrite arbitrary files by tricking the user into applying a specially crafted patch. (bsc#915328)
• CVE-2015-1396: directory traversal flaw via symbolic links. This could allow an attacker to overwrite arbitrary files by tricking the user into applying a by applying a specially crafted patch. (bsc#915329)

The following bug was fixed:

• bsc#904519: Function names in hunks (from diff -p) are now preserved in reject files.

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)