Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2009-0887

Severity CVSS v4.0:
Pending analysis
Type:
CWE-189 Numeric Errors
Publication date:
12/03/2009
Last modified:
09/04/2025

Description

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.

Impact

Vector 2.0
AV:L/AC:M/Au:S/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 6.60 MEDIUM
Vector: AV:L/AC:M/Au:S/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): Medium
Authentication (Au): Single
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
6.60
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:* 1.0.3 (including)
cpe:2.3:a:linux-pam:linux-pam:0.99.1.0:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.2.0:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.2.1:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.3.0:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.4.0:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.5.0:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.6.0:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.6.1:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.6.2:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.6.3:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.7.0:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.7.1:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.8.0:*:*:*:*:*:*:*
cpe:2.3:a:linux-pam:linux-pam:0.99.8.1:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools