CVE-2015-3238

MEDIUM

Linux-PAM <1.2.1 - DoS/Info Disclosure

Title source: llm

Description

The _unix_run_helper_binary function in the pam_unix module in Linux-PAM (aka pam) before 1.2.1, when unable to directly access passwords, allows local users to enumerate usernames or cause a denial of service (hang) via a large password.

References (13)

[Vendor Advisory] http://rhn.redhat.com/errata/RHSA-2015-1640.html

[Vendor Advisory] http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html

[Vendor Advisory] http://www.ubuntu.com/usn/USN-2935-1

[Vendor Advisory] http://www.ubuntu.com/usn/USN-2935-2

[Vendor Advisory] http://www.ubuntu.com/usn/USN-2935-3

[Issue Tracking] https://bugzilla.redhat.com/show_bug.cgi?id=1228571

[Exploit] https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-011/?fid=6551

[Exploit] https://www.trustwave.com/Resources/SpiderLabs-Blog/Username-Enumeration-against-OpenSSH-SELinux-with-CVE-2015-3238/

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/75428

[Mailing List, Third Party Advisory] http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161350.html

[Mailing List, Third Party Advisory] http://lists.fedoraproject.org/pipermail/package-announce/2015-June/161249.html

[Third Party Advisory] https://security.gentoo.org/glsa/201605-05

[Mailing List] http://www.openwall.com/lists/oss-security/2015/06/25/13

Scores

CVSS v3 6.5

EPSS 0.0361

EPSS Percentile 87.6%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Classification

CWE

CWE-200

Status draft

Affected Products (2)

linux-pam/linux-pam < 1.1.8

oracle/sparc-opl_service_processor < 1121

Timeline

Published Aug 24, 2015

Tracked Since Feb 18, 2026