Linux Kernel up to 4.4.0 File Descriptor Limit net/unix/af_unix.c memory corruption

CVSS Meta Temp Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel up to 4.4.0. This affects an unknown function of the file net/unix/af_unix.c of the component File Descriptor Limit Handler. Such manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2013-4312. Local access is required to approach this attack. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.4.0 (Operating System). It has been rated as critical. Affected by this issue is an unknown code block of the file net/unix/af_unix.c of the component File Descriptor Limit Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Linux kernel before 4.4.1 allows local users to bypass file-descriptor limits and cause a denial of service (memory consumption) by sending each descriptor over a UNIX socket before closing it, related to net/unix/af_unix.c and net/unix/garbage.c.

The weakness was disclosed 02/08/2016 by Tetsuo Handa (Website). The advisory is shared for download at security-tracker.debian.org. This vulnerability is handled as CVE-2013-4312 since 06/12/2013. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 87995 (Debian DSA-3448-1 : linux - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 256020 (CentOS Security Update for kernel (CESA-2016:0855)).

Upgrading to version 4.4.1 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (87995), SecurityFocus (BID 82986†) and Vulnerability Center (SBV-56441†). The entries VDB-68573, VDB-76938, VDB-79331 and VDB-80796 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.2
NVD Vector: 🔍

CVSSv2info

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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: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87995
Nessus Name: Debian DSA-3448-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703448
OpenVAS Name: Debian Security Advisory DSA 3448-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.4.1
Patch: git.kernel.org

Timelineinfo

06/12/2013 🔍
01/18/2016 +951 days 🔍
01/19/2016 +1 days 🔍
01/19/2016 +0 days 🔍
02/07/2016 +18 days 🔍
02/07/2016 +0 days 🔍
02/08/2016 +0 days 🔍
02/08/2016 +0 days 🔍
02/08/2016 +0 days 🔍
07/07/2022 +2340 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2929-1
Researcher: Tetsuo Handa
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-4312 (🔍)
GCVE (CVE): GCVE-0-2013-4312
GCVE (VulDB): GCVE-100-80792

OVAL: 🔍

SecurityFocus: 82986 - Linux Kernel CVE-2013-4312 Multiple Local Denial of Service Vulnerabilities
Vulnerability Center: 56441 - Linux Kernel before 4.4.1 Local DoS and Restrictions Bypass via Sending Descriptor Over a UNIX Socket before it is Closed, Medium

See also: 🔍

Entryinfo

Created: 02/08/2016 09:03
Updated: 07/07/2022 07:15
Changes: 02/08/2016 09:03 (71), 08/21/2018 08:51 (17), 07/07/2022 07:01 (5), 07/07/2022 07:15 (1)
Complete: 🔍
Cache ID: 216:826:103

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