Linux Kernel 3.3.1 fcaps suid access control

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 3.3.1. It has been rated as problematic. This issue affects the function fcaps suid. This manipulation causes access control. This vulnerability appears as CVE-2012-2123. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel 3.3.1 (Operating System). Affected by this vulnerability is the function fcaps suid. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The cap_bprm_set_creds function in security/commoncap.c in the Linux kernel before 3.3.3 does not properly handle the use of file system capabilities (aka fcaps) for implementing a privileged executable file, which allows local users to bypass intended personality restrictions via a crafted application, as demonstrated by an attack that uses a parent process to disable ASLR.

The weakness was presented 05/10/2012 by Steve Grubb as DSA-2469-1 as confirmed knowledge base article (Website). It is possible to read the advisory at debian.org. This vulnerability is known as CVE-2012-2123 since 04/04/2012. Attacking locally is a requirement. The successful exploitation requires a single authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 64177 (SuSE 11.1 Security Update : Linux kernel (SAT Patch Numbers 6547 / 6548 / 6550)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165525 (SUSE Enterprise Linux Security Update for Linux Kernel (SUSE-SU-2012:0904-1)).

Upgrading to version 2.6.32-45 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (75043), Tenable (64177), SecurityFocus (BID 53166†), OSVDB (81812†) and Secunia (SA49098†). See VDB-5384, VDB-5386, VDB-5478 and VDB-60962 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
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: 64177
Nessus Name: SuSE 11.1 Security Update : Linux kernel (SAT Patch Numbers 6547 / 6548 / 6550)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 892469
OpenVAS Name: Debian Security Advisory DSA 2469-1 (linux-2.6 - privilege escalation/denial of service
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: 🔍

Upgrade: Kernel 2.6.32-45

Timelineinfo

04/04/2012 🔍
04/20/2012 +15 days 🔍
04/20/2012 +0 days 🔍
05/10/2012 +20 days 🔍
05/10/2012 +0 days 🔍
05/11/2012 +1 days 🔍
05/11/2012 +0 days 🔍
05/15/2012 +4 days 🔍
05/17/2012 +2 days 🔍
05/17/2012 +0 days 🔍
05/28/2012 +11 days 🔍
01/25/2013 +242 days 🔍
03/24/2021 +2980 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: DSA-2469-1
Researcher: Steve Grubb
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-2123 (🔍)
GCVE (CVE): GCVE-0-2012-2123
GCVE (VulDB): GCVE-100-5383

OVAL: 🔍

X-Force: 75043
SecurityFocus: 53166
Secunia: 49098 - Debian update for linux-2.6, Less Critical
OSVDB: 81812
SecurityTracker: 1027072 - Linux Kernel fcap Lets Local Users Bypass Personality Flag Restrictions
Vulnerability Center: 35195 - Linux Kernel before 3.3.3 Local Restrictions Bypass via a Crafted Application, Low

See also: 🔍

Entryinfo

Created: 05/15/2012 11:11
Updated: 03/24/2021 14:56
Changes: 05/15/2012 11:11 (76), 04/13/2017 12:42 (12), 03/24/2021 14:51 (4), 03/24/2021 14:56 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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