National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-0887)

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Vulnerability Summary for CVE-2009-0887

Original release date:03/12/2009

Last revised:04/18/2009

Source: US-CERT/NIST

Overview

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

CVSS Severity (version 2.0):

CVSS v2 Base Score:6.6 (MEDIUM) (AV:L/AC:M/Au:S/C:C/I:C/A:C) (legend)

Impact Subscore: 10.0

Exploitability Subscore: 2.7

CVSS Version 2 Metrics:

Access Vector: Locally exploitable

Access Complexity: Medium

Authentication: Required to exploit

Impact Type:Provides administrator access, Allows complete confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (03/13/2009)

Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-0887 The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw. More information regarding issue severity can be found here: http://www.redhat.com/security/updates/classification/

References to Advisories, Solutions, and Tools

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External Source: BID

Name: 34010

Type: Patch Information

Hyperlink:http://www.securityfocus.com/bid/34010

External Source: FEDORA

Name: FEDORA-2009-3231

Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00420.html

External Source: FEDORA

Name: FEDORA-2009-3204

Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00398.html

External Source: XF

Name: linuxpam-pamstrtok-priv-escalation(49110)