This update for p7zip fixes one security issue.

This security issue was fixed :

  - CVE-2016-2335: UDF CInArchive::ReadFileItem code     execution vulnerability (bsc#979823)

This update was imported from the SUSE:SLE-12:Update update project.

Marcin 'Icewall' Noga of Cisco Talos discovered an out-of-bound read vulnerability in the CInArchive::ReadFileItem method in p7zip, a 7zr file archiver with high compression ratio. A remote attacker can take advantage of this flaw to cause a denial-of-service or, potentially the execution of arbitrary code with the privileges of the user running p7zip, if a specially crafted UDF file is processed.

Update p7zip to 16.02 and fix security issues for CVE-2016-2335, CVE-2016-2334

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

This update for p7zip fixes the following issues :

  - add p7zip-9.20.1-CVE-2016-2335.patch to fix 7zip UDF     CInArchive::ReadFileItem code execution vulnerability     [boo#979823], [CVE-2016-2335]

fix 7zip UDF CInArchive::ReadFileItem code execution vulnerability [boo#979823],[CVE-2016-2335]

The remote Ubuntu 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3913-1 advisory.

    It was discovered that p7zip did not correctly handle certain malformed archives. If a user or automated     system were tricked into processing a specially crafted archive with p7zip, then p7zip could be made to     crash, possibly leading to abitrary code execution.

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 version of 7-Zip installed on the remote Windows host is prior to 16.0. It is, therefore, affected by multiple vulnerabilities :

  - A heap buffer overflow condition exits in the     CHandler::ExtractZlibFile() function within file     Archive\HfsHandler.cpp due to improper validation of     user-supplied input. An unauthenticated, remote attacker     can exploit this by convincing a user to open a     specially crafted file, resulting in the execution of     arbitrary code. (CVE-2016-2334)

  - An out-of-bounds read error exists in the     CInArchive::ReadFileItem() function within file     Archive\Udf\UdfIn.cpp when handling Universal Disk     Format (UDF) files. An unauthenticated, remote attacker     can exploit this by convincing a user to open a     specially crafted UDF file, resulting in the execution     of arbitrary code. (CVE-2016-2335)

Marcin 'Icewall' Noga of Cisco Talos discovered an out-of-bound read vulnerability in the CInArchive::ReadFileItem method in p7zip, a 7zr file archiver with high compression ratio. A remote attacker can take advantage of this flaw to cause a denial of service or, potentially the execution of arbitrary code with the privileges of the user running p7zip, if a specially crafted UDF file is processed.

For Debian 7 'Wheezy', these problems have been fixed in version 9.20.1~dfsg.1-4+deb7u2.

We recommend that you upgrade your p7zip packages.

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

This update for p7zip fixes the following issues :

  - add p7zip-9.20.1-CVE-2016-2335.patch to fix 7zip UDF     CInArchive::ReadFileItem code execution vulnerability     [bsc#979823], [CVE-2016-2335]

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.

Cisco Talos reports :

An out-of-bounds read vulnerability exists in the way 7-Zip handles Universal Disk Format (UDF) files.

Central to 7-Zip's processing of UDF files is the CInArchive::ReadFileItem method. Because volumes can have more than one partition map, their objects are kept in an object vector. To start looking for an item, this method tries to reference the proper object using the partition map's object vector and the 'PartitionRef' field from the Long Allocation Descriptor. Lack of checking whether the 'PartitionRef' field is bigger than the available amount of partition map objects causes a read out-of-bounds and can lead, in some circumstances, to arbitrary code execution.

The remote host is affected by the vulnerability described in GLSA-201701-27 (7-Zip: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in 7-Zip. Please review       the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could entice a user to open a specially crafted       archive file possibly resulting in execution of arbitrary code with the       privileges of the process or a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Published	Updated	Severity
91867	openSUSE Security Update : p7zip (openSUSE-2016-771)	Nessus	SuSE Local Security Checks	6/28/2016	1/19/2021	high
91549	Debian DSA-3599-1 : p7zip - security update	Nessus	Debian Local Security Checks	6/10/2016	1/11/2021	high
92477	Fedora 24 : p7zip (2016-bbcb0e4eb4)	Nessus	Fedora Local Security Checks	7/21/2016	1/11/2021	high
91484	openSUSE Security Update : p7zip (openSUSE-2016-673)	Nessus	SuSE Local Security Checks	6/6/2016	1/19/2021	high
92507	openSUSE Security Update : p7zip (openSUSE-2016-890)	Nessus	SuSE Local Security Checks	7/22/2016	1/19/2021	high
123074	Ubuntu 16.04 LTS : P7ZIP vulnerabilities (USN-3913-1)	Nessus	Ubuntu Local Security Checks	3/25/2019	8/27/2024	high
91230	7-Zip < 16.00 Multiple Vulnerabilities	Nessus	Windows	5/19/2016	11/19/2019	high
92669	Fedora 23 : p7zip (2016-430bc0f808)	Nessus	Fedora Local Security Checks	8/2/2016	1/11/2021	high
91574	Debian DLA-510-1 : p7zip security update	Nessus	Debian Local Security Checks	6/14/2016	1/11/2021	high
91668	SUSE SLED12 / SLES12 Security Update : p7zip (SUSE-SU-2016:1593-1)	Nessus	SuSE Local Security Checks	6/17/2016	1/6/2021	high
92346	FreeBSD : p7zip -- out-of-bounds read vulnerability (d706a3a3-4a7c-11e6-97f7-5453ed2e2b49)	Nessus	FreeBSD Local Security Checks	7/18/2016	1/4/2021	high
96421	GLSA-201701-27 : 7-Zip: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	1/12/2017	1/11/2021	high

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