Red Hat Linux/Fedora 6 OpenSSH glibc error input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Red Hat Linux and Fedora 6. It has been classified as problematic. This impacts the function Error in the library glibc of the component OpenSSH. The manipulation leads to input validation. This vulnerability is referenced as CVE-2012-5536. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Red Hat Linux and Fedora 6 (Operating System). It has been rated as critical. This issue affects the function error in the library glibc of the component OpenSSH. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A certain Red Hat build of the pam_ssh_agent_auth module on Red Hat Enterprise Linux (RHEL) 6 and Fedora Rawhide calls the glibc error function instead of the error function in the OpenSSH codebase, which allows local users to obtain sensitive information from process memory or possibly gain privileges via crafted use of an application that relies on this module, as demonstrated by su and sudo.

The weakness was published 06/22/2012 by Agent with Red Hat as RHSA-2013:0519-2 as confirmed advisory (Red Hat Security Advisory). It is possible to read the advisory at rhn.redhat.com. The public release has been coordinated with Red Hat. The identification of this vulnerability is CVE-2012-5536 since 10/24/2012. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 69724 (Amazon Linux AMI : openssh (ALAS-2013-165)), 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 350581 (Amazon Linux Security Advisory for openssh: ALAS-2013-165).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at pkgs.fedoraproject.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (82231), Tenable (69724), SecurityFocus (BID 58097†), OSVDB (90474†) and Secunia (SA52312†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.4
VulDB Temp Score: 8.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 69724
Nessus Name: Amazon Linux AMI : openssh (ALAS-2013-165)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881646
OpenVAS Name: CentOS Update for openssh CESA-2013:0519 centos6
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: 🔍

Patch: pkgs.fedoraproject.org

Timelineinfo

06/22/2012 🔍
06/22/2012 +0 days 🔍
06/22/2012 +0 days 🔍
06/22/2012 +0 days 🔍
10/24/2012 +124 days 🔍
02/21/2013 +120 days 🔍
02/21/2013 +0 days 🔍
02/22/2013 +1 days 🔍
02/26/2013 +4 days 🔍
09/04/2013 +190 days 🔍
12/29/2024 +4134 days 🔍

Sourcesinfo

Vendor: redhat.com

Advisory: RHSA-2013:0519-2
Researcher: Agent
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-5536 (🔍)
GCVE (CVE): GCVE-0-2012-5536
GCVE (VulDB): GCVE-100-7775

OVAL: 🔍

X-Force: 82231
SecurityFocus: 58097 - 'pam_ssh_agent_auth' Module CVE-2012-5536 Local Denial of Service Vulnerability
Secunia: 52312 - Red Hat update for openssh, Less Critical
OSVDB: 90474
SecurityTracker: 1028187 - OpenSSH pam_ssh_agent_auth Module on Red Hat Enterprise Linux Lets Remote Users Execute Arbitrary Code
Vulnerability Center: 38551 - Red Hat Enterprise Linux and Fedora Rawhide \x27pam_ssh_agent_auth\x27 Module Local Information Disclosure, Low

Entryinfo

Created: 02/22/2013 11:09
Updated: 12/29/2024 05:55
Changes: 02/22/2013 11:09 (83), 04/25/2017 11:12 (6), 05/05/2021 12:49 (3), 12/29/2024 05:55 (16)
Complete: 🔍
Committer:
Cache ID: 216:927:103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!