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    CVE-2010-3431

    The privilege-dropping implementation in the (1) pam_env and (2) pam_mail modules in Linux-PAM (aka pam) 1.1.2 does not check the return value of the setfsuid system call, which might allow local users to obtain sensitive information by leveraging an unintended uid, as demonstrated by a symlink attack on the .pam_environment file in a user's home directory. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-3435.

    Published:Sep 21, 2010
    Last Modified:Apr 11, 2025
    EPS:Jan 24, 2011
    EPSS Score:0.00078
    CVSS Score:1.9

    Affected Products

    Vendor
    Linux-pam
    Product
    Linux-pam

    Exploits

    No exploit reference

    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://git.altlinux.org/people/ldv/packages/?p=pam.git%3Ba=commit%3Bh=843807a3a90f52e7538be756616510730a24739a
    http://openwall.com/lists/oss-security/2010/09/21/10
    http://openwall.com/lists/oss-security/2010/09/21/3
    http://openwall.com/lists/oss-security/2010/09/21/8
    http://openwall.com/lists/oss-security/2010/09/21/9
    http://openwall.com/lists/oss-security/2010/09/27/10
    http://openwall.com/lists/oss-security/2010/09/27/4
    http://openwall.com/lists/oss-security/2010/09/27/5
    http://openwall.com/lists/oss-security/2010/09/27/7
    http://openwall.com/lists/oss-security/2010/10/03/1
    http://openwall.com/lists/oss-security/2010/10/25/2
    http://secunia.com/advisories/49711
    http://security.gentoo.org/glsa/glsa-201206-31.xml
    http://www.openwall.com/lists/oss-security/2010/09/21/11
    http://www.openwall.com/lists/oss-security/2010/09/24/2
    https://bugzilla.redhat.com/show_bug.cgi?id=641361
    http://git.altlinux.org/people/ldv/packages/?p=pam.git%3Ba=commit%3Bh=843807a3a90f52e7538be756616510730a24739a
    http://openwall.com/lists/oss-security/2010/09/21/10
    http://openwall.com/lists/oss-security/2010/09/21/3
    http://openwall.com/lists/oss-security/2010/09/21/8
    http://openwall.com/lists/oss-security/2010/09/21/9
    http://openwall.com/lists/oss-security/2010/09/27/10
    http://openwall.com/lists/oss-security/2010/09/27/4
    http://openwall.com/lists/oss-security/2010/09/27/5
    http://openwall.com/lists/oss-security/2010/09/27/7
    http://openwall.com/lists/oss-security/2010/10/03/1
    http://openwall.com/lists/oss-security/2010/10/25/2
    http://secunia.com/advisories/49711
    http://security.gentoo.org/glsa/glsa-201206-31.xml
    http://www.openwall.com/lists/oss-security/2010/09/21/11
    http://www.openwall.com/lists/oss-security/2010/09/24/2
    https://bugzilla.redhat.com/show_bug.cgi?id=641361

    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