Linux Kernel fs/xfs/xfs_acl.c xfs_acl_from_disk numeric error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel. This issue affects the function xfs_acl_from_disk of the file fs/xfs/xfs_acl.c. The manipulation results in numeric error. This vulnerability is identified as CVE-2012-0038. Additionally, an exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel (Operating System) (version unknown). Affected is the function xfs_acl_from_disk of the file fs/xfs/xfs_acl.c. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Integer overflow in the xfs_acl_from_disk function in fs/xfs/xfs_acl.c in the Linux kernel before 3.1.9 allows local users to cause a denial of service (panic) via a filesystem with a malformed ACL, leading to a heap-based buffer overflow.

The weakness was released 01/10/2012 by Xi Wang as confirmed git commit (GIT Repository). The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2012-0038 since 12/07/2011. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 57938 (USN-1364-1 : linux-ti-omap4 vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350692 (Amazon Linux Security Advisory for kernel: ALAS-2012-055).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at Tenable (57938), SecurityFocus (BID 51380†), OSVDB (78226†), Secunia (SA47488†) and SecurityTracker (ID 1026512†). Entries connected to this vulnerability are available at VDB-4434, VDB-4553, VDB-4488 and VDB-4523. 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: 7.4
VulDB Meta Temp Score: 7.0

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 57938
Nessus Name: USN-1364-1 : linux-ti-omap4 vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881118
OpenVAS Name: CentOS Update for kernel CESA-2012:0350 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

12/07/2011 🔍
01/10/2012 +34 days 🔍
01/11/2012 +1 days 🔍
01/11/2012 +0 days 🔍
01/11/2012 +0 days 🔍
01/11/2012 +0 days 🔍
01/11/2012 +0 days 🔍
01/12/2012 +0 days 🔍
01/21/2012 +9 days 🔍
02/14/2012 +24 days 🔍
05/17/2012 +93 days 🔍
03/20/2021 +3229 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Researcher: Xi Wang
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-0038 (🔍)
GCVE (CVE): GCVE-0-2012-0038
GCVE (VulDB): GCVE-100-4536

OVAL: 🔍

SecurityFocus: 51380 - Linux Kernel XFS Filesystem 'fs/xfs/xfs_acl.c' Integer Overflow Vulnerability
Secunia: 47488 - Linux Kernel "xfs_acl_from_disk()" Integer Overflow Vulnerability, Less Critical
OSVDB: 78226
SecurityTracker: 1026512 - Linux Kernel XFS Heap Overflow May Let Remote Users Execute Arbitrary Code
Vulnerability Center: 34208 - Linux Kernel 2.6.x \x27xfs_acl_from_disk()\x27 Integer Overflow Allows Local Privileges Escalation, High

See also: 🔍

Entryinfo

Created: 01/21/2012 01:00
Updated: 03/20/2021 12:56
Changes: 01/21/2012 01:00 (75), 04/09/2017 13:20 (13), 03/20/2021 12:54 (13), 03/20/2021 12:56 (1)
Complete: 🔍
Cache ID: 216:F11:103

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