IBM AIX 6.1/7.1 fuser -k access control

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in IBM AIX 6.1/7.1. This impacts the function fuser. The manipulation of the argument -k results in access control. This vulnerability is identified as CVE-2012-4833. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in IBM AIX 6.1/7.1 (Operating System). It has been classified as problematic. Affected is the function fuser. The manipulation of the argument -k with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on availability. CVE summarizes:

fuser in IBM AIX 6.1 and 7.1, and VIOS 2.2.1.4-FP-25 SP-02, does not properly restrict the -k option, which allows local users to kill arbitrary processes via a crafted command line.

The issue has been introduced in 11/09/2007. The weakness was released 09/28/2012 as confirmed posting (Website). The advisory is shared for download at aix.software.ibm.com. The public release happened without coordination with the vendor. This vulnerability is traded as CVE-2012-4833 since 09/06/2012. The exploitability is told to be easy. 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 MITRE ATT&CK project declares the attack technique as T1068.

It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 1785 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 71161 (AIX 6.1 TL 9 : bos.rte.filesystem (U854544)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 120869 (IBM AIX "fuser" Local Denial of Service Vulnerability).

Applying the patch fuser_fix is able to eliminate this problem. The bugfix is ready for download at aix.software.ibm.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (78907), Tenable (71161), SecurityFocus (BID 55726†), OSVDB (85869†) and Secunia (SA50708†). 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: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
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: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 71161
Nessus Name: AIX 6.1 TL 9 : bos.rte.filesystem (U854544)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: fuser_fix

Timelineinfo

11/09/2007 🔍
09/06/2012 +1763 days 🔍
09/28/2012 +22 days 🔍
09/28/2012 +0 days 🔍
09/28/2012 +0 days 🔍
09/28/2012 +0 days 🔍
09/29/2012 +1 days 🔍
10/01/2012 +2 days 🔍
10/01/2012 +0 days 🔍
10/02/2012 +1 days 🔍
10/03/2012 +1 days 🔍
10/04/2012 +1 days 🔍
12/03/2013 +425 days 🔍
04/22/2025 +4158 days 🔍

Sourcesinfo

Vendor: ibm.com

Advisory: aix.software.ibm.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-4833 (🔍)
GCVE (CVE): GCVE-0-2012-4833
GCVE (VulDB): GCVE-100-6576

OVAL: 🔍

X-Force: 78907 - IBM AIX fuser command denial of service, Low Risk
SecurityFocus: 55726 - IBM AIX CVE-2012-4833 Local Denial of Service Vulnerability
Secunia: 50708 - IBM AIX "fuser" Command Denial of Service, Not Critical
OSVDB: 85869
SecurityTracker: 1027586 - IBM AIX fuser Command Bug Lets Local Users Deny Service
Vulnerability Center: 36303 - IBM AIX 6.1 and 7.1 and VIOS Local Denial of Service via -k Option in Fuser, Medium

Entryinfo

Created: 10/04/2012 10:57
Updated: 04/22/2025 23:28
Changes: 10/04/2012 10:57 (79), 04/17/2017 11:43 (12), 04/14/2021 15:17 (2), 12/29/2024 20:23 (16), 04/22/2025 23:28 (2)
Complete: 🔍
Committer: olku
Cache ID: 216:813:103

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