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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.

    Published:Feb 25, 2009
    Last Modified:Apr 23, 2026
    EPS:Mar 12, 2009
    EPSS Score:0.00212
    CVSS Score:6.6

    Affected Products

    Vendor
    Linux-pam
    Product
    Linux-pam

    Exploits

    http://openwall.com/lists/oss-security/2009/03/05/1http://openwall.com/lists/oss-security/2009/03/05/1

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-54411 (CVSS 6.9) — Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module's plainte…
    CVE-2024-10041 (CVSS 4.7) — A vulnerability was found in PAM. The secret information is stored in memory, where the attacker can trigger t…
    CVE-2024-22365 (CVSS 5.5) — linux-pam (aka Linux PAM) before 1.6.0 allows attackers to cause a denial of service (blocked login process) v…
    CVE-2022-28321 (CVSS 9.8) — The Linux-PAM package before 1.5.2-6.1 for openSUSE Tumbleweed allows authentication bypass for SSH logins. Th…
    CVE-2020-27780 (CVSS 9.8) — A flaw was found in Linux-Pam in versions prior to 1.5.1 in the way it handle empty passwords for non-existing…
    CVE-2015-3238 (CVSS 6.5) — The _unix_run_helper_binary function in the pam_unix module in Linux-PAM (aka pam) before 1.2.1, when unable t…
    CVE-2014-2583 (CVSS 5.8) — Multiple directory traversal vulnerabilities in pam_timestamp.c in the pam_timestamp module for Linux-PAM (aka…
    CVE-2011-3148 (CVSS 4.6) — Stack-based buffer overflow in the _assemble_line function in modules/pam_env/pam_env.c in Linux-PAM (aka pam)…
    CVE-2011-3149 (CVSS 2.1) — The _expand_arg function in the pam_env module (modules/pam_env/pam_env.c) in Linux-PAM (aka pam) before 1.1.5…
    CVE-2010-3853 (CVSS 6.9) — pam_namespace.c in the pam_namespace module in Linux-PAM (aka pam) before 1.1.3 uses the environment of the in…

    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High