Vulnerability Monitor

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CVE-2009-0887

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.

Security Impact Summary

CVE-2009-0887 is a security vulnerability that . Impacting 1 product from linux-pam organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2009, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2009-03-12T15:20:50.127

Last Modified

2025-04-09T00:30:58.490

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 6.6 (MEDIUM)

CVSSv2 Vector

AV:L/AC:M/Au:S/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: SINGLE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

2.7

Impact Score

10.0

Weaknesses

Type: Primary
CWE-189

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	linux-pam	linux-pam	≤ 1.0.3	Yes
Application	linux-pam	linux-pam	0.99.1.0	Yes
Application	linux-pam	linux-pam	0.99.2.0	Yes
Application	linux-pam	linux-pam	0.99.2.1	Yes
Application	linux-pam	linux-pam	0.99.3.0	Yes
Application	linux-pam	linux-pam	0.99.4.0	Yes
Application	linux-pam	linux-pam	0.99.5.0	Yes
Application	linux-pam	linux-pam	0.99.6.0	Yes
Application	linux-pam	linux-pam	0.99.6.1	Yes
Application	linux-pam	linux-pam	0.99.6.2	Yes
Application	linux-pam	linux-pam	0.99.6.3	Yes
Application	linux-pam	linux-pam	0.99.7.0	Yes
Application	linux-pam	linux-pam	0.99.7.1	Yes
Application	linux-pam	linux-pam	0.99.8.0	Yes
Application	linux-pam	linux-pam	0.99.8.1	Yes
Application	linux-pam	linux-pam	0.99.9.0	Yes
Application	linux-pam	linux-pam	0.99.10.0	Yes
Application	linux-pam	linux-pam	1.0.0	Yes
Application	linux-pam	linux-pam	1.0.1	Yes
Application	linux-pam	linux-pam	1.0.2	Yes

References

http://openwall.com/lists/oss-security/2009/03/05/1 Exploit ([email protected])
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?r1=1.9&amp%3Br2=1.10&amp%3Bview=patch ([email protected])
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?view=log ([email protected])
http://secunia.com/advisories/34733 ([email protected])
http://www.mandriva.com/security/advisories?name=MDVSA-2009:077 ([email protected])
http://www.securityfocus.com/bid/34010 Patch ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/49110 ([email protected])
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00398.html ([email protected])
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00420.html ([email protected])
http://openwall.com/lists/oss-security/2009/03/05/1 Exploit (af854a3a-2127-422b-91ae-364da2661108)
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?r1=1.9&amp%3Br2=1.10&amp%3Bview=patch (af854a3a-2127-422b-91ae-364da2661108)
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?view=log (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/34733 (af854a3a-2127-422b-91ae-364da2661108)
http://www.mandriva.com/security/advisories?name=MDVSA-2009:077 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/34010 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/49110 (af854a3a-2127-422b-91ae-364da2661108)
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00398.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00420.html (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For linux-pam's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.