Linux-PAM up to 1.0.3 _pam_StrTok numeric error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k0.00

A vulnerability classified as critical has been found in Linux-PAM. This affects the function _pam_StrTok. 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. The summary by CVE is:

Integer signedness error in the _pam_StrTok function in libpam/pam_misc.c in Linux-PAM (aka pam) 1.0.3 and earlier, when a configuration file contains non-ASCII usernames, might allow remote attackers to cause a denial of service, and might allow remote authenticated users to obtain login access with a different user s non-ASCII username, via a login attempt.

The bug was discovered 02/25/2009. The weakness was published 03/12/2009 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2009-0887 since 03/12/2009. Attacking locally is a requirement. The requirement for exploitation is a authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 40879 (GLSA-200909-01 : Linux-PAM: Privilege escalation), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published 7 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (49110) and Tenable (40879).

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 40879
Nessus Name: GLSA-200909-01 : Linux-PAM: Privilege escalation
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 63788
OpenVAS Name: Fedora Core 10 FEDORA-2009-3204 (pam)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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0-Day Time: 🔍
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Timelineinfo

02/25/2009 🔍
02/25/2009 +0 days 🔍
03/05/2009 +8 days 🔍
03/12/2009 +7 days 🔍
03/12/2009 +0 days 🔍
03/12/2009 +0 days 🔍
04/15/2009 +34 days 🔍
04/19/2009 +4 days 🔍
09/07/2009 +141 days 🔍
09/08/2009 +1 days 🔍
03/17/2015 +2016 days 🔍
09/01/2019 +1629 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-0887 (🔍)
OVAL: 🔍

X-Force: 49110
Vulnerability Center: 21621 - Linux-PAM <= 1.0.3 Vulnerability Allows Remote Authenticated Attackers to Gain Elevated Privileges, Low
SecurityFocus: 34010 - Linux-PAM Configuration File Non-ASCII User Name Handling Local Privilege Escalation Vulnerability
Secunia: 34733
OSVDB: 53112 - Linux-PAM - Configuration File Non-ASCII User Name Handling Local Privilege Escalation Issue

Entryinfo

Created: 03/17/2015 23:38
Updated: 09/01/2019 18:28
Changes: 03/17/2015 23:38 (75), 09/01/2019 18:28 (5)
Complete: 🔍

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