Linux-PAM up to 1.1.1 User Account symlink

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux-PAM. It has been classified as problematic. Impacted is an unknown function of the component User Account. This manipulation causes symlink. This vulnerability is registered as CVE-2010-3435. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Linux-PAM. Affected by this vulnerability is an unknown code block of the component User Account. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect confidentiality. The summary by CVE is:

The (1) pam_env and (2) pam_mail modules in Linux-PAM (aka pam) before 1.1.2 use root privileges during read access to files and directories that belong to arbitrary user accounts, which might allow local users to obtain sensitive information by leveraging this filesystem activity, as demonstrated by a symlink attack on the .pam_environment file in a user s home directory.

The weakness was published 01/24/2011 by Sebastian Krahmer as Bug 641335 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2010-3435 since 09/17/2010. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 50804 (CentOS 5 : pam (CESA-2010:0819)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119031 (VMware ESX SLPD Denial of Service Vulnerability and Security Update for Third-Party Components (VMSA-2011-0004)).

Upgrading to version 0.99.7.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (50804), SecurityFocus (BID 43487†), Secunia (SA49711†) and Vulnerability Center (SBV-28027†). Similar entries are available at VDB-56223, VDB-56222, VDB-56216 and VDB-56214. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.6

VulDB Base Score: 6.2
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Symlink
CWE: CWE-61 / CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 50804
Nessus Name: CentOS 5 : pam (CESA-2010:0819)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 862515
OpenVAS Name: Fedora Update for pam FEDORA-2010-17112
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Linux-PAM 0.99.7.0
Patch: 06f882f30092a39a1db867c9744b2ca8d60e4ad6

Timelineinfo

09/17/2010 🔍
09/24/2010 +7 days 🔍
11/03/2010 +40 days 🔍
11/08/2010 +5 days 🔍
01/24/2011 +77 days 🔍
01/24/2011 +0 days 🔍
06/26/2012 +519 days 🔍
03/19/2015 +996 days 🔍
10/13/2021 +2400 days 🔍

Sourcesinfo

Advisory: Bug 641335
Researcher: Sebastian Krahmer
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-3435 (🔍)
GCVE (CVE): GCVE-0-2010-3435
GCVE (VulDB): GCVE-100-56215

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 43487 - Linux-PAM 'pam_env' and 'pam_mail' Modules Multiple Vulnerabilities
Secunia: 49711 - Gentoo update for pam, Less Critical
Vulnerability Center: 28027 - Linux-PAM before 1.1.2 \x27pam_env\x27 and \x27pam_mail\x27 Modules Local Directory Information Disclosure, Medium
Vupen: ADV-2011-0606

See also: 🔍

Entryinfo

Created: 03/19/2015 23:27
Updated: 10/13/2021 07:12
Changes: 03/19/2015 23:27 (66), 03/08/2017 22:02 (15), 10/13/2021 07:00 (4), 10/13/2021 07:12 (1)
Complete: 🔍
Cache ID: 216:D49:103

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

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