7-zip 15.14 ExtractZlibFile memory corruption

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.7	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in 7-zip 15.14 and classified as critical. Affected by this vulnerability is the function NArchive::NHfs::CHandler::ExtractZlibFile. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2016-2334. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in 7-zip 15.14 (File Compression Software). It has been declared as critical. Affected by this vulnerability is the function NArchive::NHfs::CHandler::ExtractZlibFile. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in the NArchive::NHfs::CHandler::ExtractZlibFile method in 7zip before 16.00 and p7zip allows remote attackers to execute arbitrary code via a crafted HFS+ image.

The weakness was disclosed 05/11/2016 by Cisco with Cisco Talos as confirmed advisory (Website). It is possible to read the advisory at talosintel.com. This vulnerability is known as CVE-2016-2334 since 02/12/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 92477 (Fedora 24 : p7zip (2016-bbcb0e4eb4)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 122918 (7-ZIP Multiple Vulnerabilities).

Upgrading to version 16.00 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (113161), Tenable (92477) and SecurityFocus (BID 90531†). The entries VDB-87306, VDB-92223 and VDB-112652 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

File Compression Software

Name

7-zip

Version

15.14

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.8
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 92477
Nessus Name: Fedora 24 : p7zip (2016-bbcb0e4eb4)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 855029
OpenVAS Name: Fedora Update for p7zip FEDORA-2016-430bc0f808
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: 7-zip 16.00

Timelineinfo

02/12/2016 🔍
05/10/2016 +88 days 🔍
05/11/2016 +1 days 🔍
05/13/2016 +2 days 🔍
07/20/2016 +68 days 🔍
07/21/2016 +1 days 🔍
12/13/2016 +145 days 🔍
08/19/2022 +2075 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-bbcb0e4eb4
Researcher: Cisco
Organization: Cisco Talos
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2334 (🔍)
GCVE (CVE): GCVE-0-2016-2334
GCVE (VulDB): GCVE-100-87307
X-Force: 113161 - 7-Zip NArchive::NHfs::CHandler::ExtractZlibFile buffer overflow
SecurityFocus: 90531 - 7-Zip Multiple Remote Code Execution Vulnerabilities
SecurityTracker: 1035876

See also: 🔍

Entryinfo

Created: 05/13/2016 11:20
Updated: 08/19/2022 09:59
Changes: 05/13/2016 11:20 (73), 11/24/2018 12:24 (13), 08/19/2022 09:57 (4), 08/19/2022 09:59 (1)
Complete: 🔍
Cache ID: 216:CD9:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.