GNU patch 2.7.1 allows remote attackers to write to arbitrary files via a symlink attack in a patch file.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - patch: directory traversal via file rename (CVE-2015-1395)

  - GNU patch 2.7.1 allows remote attackers to write to arbitrary files via a symlink attack in a patch file.
    (CVE-2015-1196)

  - In GNU patch through 2.7.6, the following of symlinks is mishandled in certain cases other than input     files. This affects inp.c and util.c. (CVE-2019-13636)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

According to the versions of the patch package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A double free exists in the another_hunk function in     pch.c in GNU patch through 2.7.6.(CVE-2018-6952)

  - 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.(CVE-2015-1395)

  - An issue was discovered in GNU patch before 2.7.6.
    Out-of-bounds access within pch_write_line() in pch.c     can possibly lead to DoS via a crafted input     file.(CVE-2016-10713)

  - GNU patch 2.7.2 and earlier allows remote attackers to     cause a denial of service (memory consumption and     segmentation fault) via a crafted diff     file.(CVE-2014-9637)

  - This vulnerability has been modified since it was last     analyzed by the NVD. It is awaiting reanalysis which     may result in further changes to the information     provided.(CVE-2015-1196)

  - GNU patch through 2.7.6 is vulnerable to OS shell     command injection that can be exploited by opening a     crafted patch file that contains an ed style diff     payload with shell metacharacters. The ed editor does     not need to be present on the vulnerable system. This     is different from CVE-2018-1000156.(CVE-2019-13638)

  - do_ed_script in pch.c in GNU patch through 2.7.6 does     not block strings beginning with a ! character. NOTE:
    this is the same commit as for CVE-2019-13638, but the     ! syntax is specific to ed, and is unrelated to a shell     metacharacter.(CVE-2018-20969)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the patch package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in GNU patch before 2.7.6.
    Out-of-bounds access within pch_write_line() in pch.c     can possibly lead to DoS via a crafted input     file.(CVE-2016-10713)

  - GNU patch 2.7.2 and earlier allows remote attackers to     cause a denial of service (memory consumption and     segmentation fault) via a crafted diff     file.(CVE-2014-9637)

  - GNU patch 2.7.1 allows remote attackers to write to     arbitrary files via a symlink attack in a patch     file.(CVE-2015-1196)

  - GNU patch through 2.7.6 is vulnerable to OS shell     command injection that can be exploited by opening a     crafted patch file that contains an ed style diff     payload with shell metacharacters. The ed editor does     not need to be present on the vulnerable system. This     is different from CVE-2018-1000156.(CVE-2019-13638)

  - do_ed_script in pch.c in GNU patch through 2.7.6 does     not block strings beginning with a ! character. NOTE:
    this is the same commit as for CVE-2019-13638, but the     ! syntax is specific to ed, and is unrelated to a shell     metacharacter.(CVE-2018-20969)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the patch package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in GNU patch before 2.7.6.
    Out-of-bounds access within pch_write_line() in pch.c     can possibly lead to DoS via a crafted input     file.(CVE-2016-10713)

  - do_ed_script in pch.c in GNU patch through 2.7.6 does     not block strings beginning with a ! character. NOTE:
    this is the same commit as for CVE-2019-13638, but the     ! syntax is specific to ed, and is unrelated to a shell     metacharacter.(CVE-2018-20969)

  - GNU patch 2.7.1 allows remote attackers to write to     arbitrary files via a symlink attack in a patch     file.(CVE-2015-1196)

  - GNU patch 2.7.2 and earlier allows remote attackers to     cause a denial of service (memory consumption and     segmentation fault) via a crafted diff     file.(CVE-2014-9637)

  - GNU patch through 2.7.6 is vulnerable to OS shell     command injection that can be exploited by opening a     crafted patch file that contains an ed style diff     payload with shell metacharacters. The ed editor does     not need to be present on the vulnerable system. This     is different from CVE-2018-1000156.(CVE-2019-13638)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the patch package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - GNU patch 2.7.2 and earlier allows remote attackers to     cause a denial of service (memory consumption and     segmentation fault) via a crafted diff     file.(CVE-2014-9637)

  - An issue was discovered in GNU patch before 2.7.6.
    Out-of-bounds access within pch_write_line() in pch.c     can possibly lead to DoS via a crafted input     file.(CVE-2016-10713)

  - GNU patch 2.7.1 allows remote attackers to write to     arbitrary files via a symlink attack in a patch     file.(CVE-2015-1196)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the patch package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - GNU patch 2.7.1 allows remote attackers to write to     arbitrary files via a symlink attack in a patch     file.(CVE-2015-1196)

  - GNU patch 2.7.2 and earlier allows remote attackers to     cause a denial of service (memory consumption and     segmentation fault) via a crafted diff     file.(CVE-2014-9637)

  - A heap-based out-of-bounds read flaw was found in the     way the patch utility parsed patch files. An attacker     could potentially use this flaw to crash the patch     utility by tricking it into processing crafted patch     files.(CVE-2016-10713)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2651-1 advisory.

    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)

    Lszl Bszrmnyi 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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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).

New patch packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, and -current to fix a security issue.

This update fixes the following security issue :

  + Security fix for a directory traversal flaw when     handling git-style patches. This could allow an attacker     to overwrite arbitrary files by applying a specially     crafted patch. [boo#913678] [CVE-2015-1196]

    This update fixes the following issues :

  + When a file isn't being deleted because the file     contents don't match the patch, the resulting message is     now 'Not deleting file ... as content differs from     patch' instead of 'File ... is not empty after patch;
    not deleting'.

  + Function names in hunks (from diff -p) are now preserved     in reject files [boo#904519]

ID	Name	Product	Family	Severity
198348	RHEL 7 : patch (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
135608	EulerOS Virtualization 3.0.2.2 : patch (EulerOS-SA-2020-1446)	Nessus	Huawei Local Security Checks	high
134514	EulerOS Virtualization for ARM 64 3.0.2.0 : patch (EulerOS-SA-2020-1225)	Nessus	Huawei Local Security Checks	high
132180	EulerOS 2.0 SP3 : patch (EulerOS-SA-2019-2645)	Nessus	Huawei Local Security Checks	high
131582	EulerOS 2.0 SP2 : patch (EulerOS-SA-2019-2428)	Nessus	Huawei Local Security Checks	medium
129176	EulerOS 2.0 SP5 : patch (EulerOS-SA-2019-1982)	Nessus	Huawei Local Security Checks	medium
84339	Ubuntu 14.04 LTS : GNU patch vulnerabilities (USN-2651-1)	Nessus	Ubuntu Local Security Checks	high
84083	SUSE SLED12 / SLES12 Security Update : patch (SUSE-SU-2015:1019-1)	Nessus	SuSE Local Security Checks	high
82391	Mandriva Linux Security Advisory : patch (MDVSA-2015:138)	Nessus	Mandriva Local Security Checks	medium
81933	Mandriva Linux Security Advisory : patch (MDVSA-2015:050)	Nessus	Mandriva Local Security Checks	medium
81386	Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / current : patch (SSA:2015-047-01)	Nessus	Slackware Local Security Checks	medium
81156	openSUSE Security Update : patch (openSUSE-SU-2015:0199-1)	Nessus	SuSE Local Security Checks	medium

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