Linux Kernel 2.6.36/3.3 tmpfs System kernel/fork.c shmem_remount_fs resource management

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel 2.6.36/3.3. The impacted element is the function shmem_remount_fs of the file kernel/fork.c of the component tmpfs System. Performing a manipulation results in resource management. This vulnerability is cataloged as CVE-2013-1767. Furthermore, there is an exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel 2.6.36/3.3 (Operating System). This affects the function shmem_remount_fs of the file kernel/fork.c of the component tmpfs System. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Use-after-free vulnerability in the shmem_remount_fs function in mm/shmem.c in the Linux kernel before 3.7.10 allows local users to gain privileges or cause a denial of service (system crash) by remounting a tmpfs filesystem without specifying a required mpol (aka mempolicy) mount option.

The issue has been introduced in 10/20/2010. The weakness was shared 02/23/2013 by Jason A. Donenfeld as not defined mailinglist post (oss-sec). It is possible to read the advisory at seclists.org. This vulnerability is uniquely identified as CVE-2013-1767 since 02/19/2013. Attacking locally is a requirement. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

After 1 days, there has been an exploit disclosed. The exploit is shared for download at git.zx2c4.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 857 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 69758 (Amazon Linux AMI : kernel (ALAS-2013-200)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350544 (Amazon Linux Security Advisory for kernel: ALAS-2013-200).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.zx2c4.com. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (69758), SecurityFocus (BID 58177†), OSVDB (90665†), Secunia (SA52845†) and Vulnerability Center (SBV-38564†). The entries VDB-7108, VDB-7840, VDB-7997 and VDB-8176 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 8.4

VulDB Base Score: 9.3
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 69758
Nessus Name: Amazon Linux AMI : kernel (ALAS-2013-200)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 892668
OpenVAS Name: Debian Security Advisory DSA 2668-1 (linux-2.6 - privilege escalation/denial of service/information leak
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.zx2c4.com
McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

10/20/2010 🔍
02/19/2013 +853 days 🔍
02/23/2013 +4 days 🔍
02/24/2013 +1 days 🔍
02/24/2013 +0 days 🔍
02/26/2013 +2 days 🔍
02/26/2013 +0 days 🔍
02/27/2013 +1 days 🔍
02/28/2013 +1 days 🔍
02/28/2013 +0 days 🔍
04/03/2013 +34 days 🔍
05/05/2021 +2954 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Researcher: Jason A. Donenfeld
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-1767 (🔍)
GCVE (CVE): GCVE-0-2013-1767
GCVE (VulDB): GCVE-100-7839

OVAL: 🔍

SecurityFocus: 58177 - Linux Kernel CVE-2013-1767 Local Privilege Escalation Vulnerability
Secunia: 52845 - Ubuntu update for kernel, Less Critical
OSVDB: 90665
Vulnerability Center: 38564 - Linux Kernel Local Denial of Service and Possible Privilege Escalation due to a Problem With tmpfs, High

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/28/2013 17:27
Updated: 05/05/2021 15:43
Changes: 02/28/2013 17:27 (90), 04/25/2017 11:15 (4), 05/05/2021 15:43 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:420:103

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