Linux Kernel up to 4.3.2 epoll_ctl Call net/unix/af_unix.c use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 4.3.2. Impacted is an unknown function of the file net/unix/af_unix.c of the component epoll_ctl Call Handler. The manipulation results in use after free. This vulnerability is known as CVE-2013-7446. Attacking locally is a requirement. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 4.3.2 (Operating System). Affected is an unknown functionality of the file net/unix/af_unix.c of the component epoll_ctl Call Handler. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability. CVE summarizes:

Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel before 4.3.3 allows local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls.

The weakness was published 12/28/2015 (Website). The advisory is shared for download at lkml.org. This vulnerability is traded as CVE-2013-7446 since 11/18/2015. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 88519 (Ubuntu 14.04 LTS : linux vulnerabilities (USN-2887-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169069 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2016:2074-1)).

Upgrading to version 4.3.3 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (88519) and SecurityFocus (BID 77638†). Similar entries are available at VDB-75137, VDB-77323, VDB-78716 and VDB-79118. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88519
Nessus Name: Ubuntu 14.04 LTS : linux vulnerabilities (USN-2887-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703426
OpenVAS Name: Debian Security Advisory DSA 3426-1 (linux - security update)
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: Kernel 4.3.3
Patch: git.kernel.org

Timelineinfo

09/10/2015 🔍
11/18/2015 +69 days 🔍
12/28/2015 +40 days 🔍
12/28/2015 +0 days 🔍
12/29/2015 +1 days 🔍
02/01/2016 +34 days 🔍
02/02/2016 +1 days 🔍
07/01/2022 +2341 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2887-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-7446 (🔍)
GCVE (CVE): GCVE-0-2013-7446
GCVE (VulDB): GCVE-100-79920

OVAL: 🔍

SecurityFocus: 77638 - Linux kernel CVE-2013-7446 Use After Free Denial of Service Vulnerability
SecurityTracker: 1034557

See also: 🔍

Entryinfo

Created: 12/29/2015 13:20
Updated: 07/01/2022 14:55
Changes: 12/29/2015 13:20 (57), 05/25/2018 10:11 (26), 07/01/2022 14:54 (6), 07/01/2022 14:55 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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