Moderate CentOS pam Security Update


pam-1.1.1-20.el6_7.1.i686.rpm, pam-1.1.1-20.el6_7.1.src.rpm, pam-1.1.1-20.el6_7.1.x86_64.rpm, pam-1.1.8-12.el7_1.1.i686.rpm, pam-1.1.8-12.el7_1.1.src.rpm, pam-1.1.8-12.el7_1.1.x86_64.rpm, pam-devel-1.1.1-20.el6_7.1.i686.rpm, pam-devel-1.1.1-20.el6_7.1.x86_64.rpm, pam-devel-1.1.8-12.el7_1.1.i686.rpm, pam-devel-1.1.8-12.el7_1.1.x86_64.rpm,,
2018-01-18 11:10
2017-07-27 19:09
2017-04-01 19:09
2017-01-05 20:13


An updated pam package that fixes one security issue is now available for
Red Hat Enterprise Linux 6 and 7.

Red Hat Product Security has rated this update as having Moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

Pluggable Authentication Modules (PAM) provide a system whereby
administrators can set up authentication policies without having to
recompile programs to handle authentication.

It was discovered that the _unix_run_helper_binary() function of PAM's
unix_pam module could write to a blocking pipe, possibly causing the
function to become unresponsive. An attacker able to supply large passwords
to the unix_pam module could use this flaw to enumerate valid user
accounts, or cause a denial of service on the system. (CVE-2015-3238)

Red Hat would like to thank Sebastien Macke of Trustwave SpiderLabs for
reporting this issue.

All pam users are advised to upgrade to this updated package, which
contains a backported patch to correct this issue.
Please see

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

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Affected package information

Release Package Patched in
6 pam pam-1.1.1-20.el6_7.1.i686.rpm
pam pam-1.1.1-20.el6_7.1.src.rpm
pam pam-1.1.1-20.el6_7.1.x86_64.rpm
pam-devel pam-devel-1.1.1-20.el6_7.1.i686.rpm
pam-devel pam-devel-1.1.1-20.el6_7.1.x86_64.rpm
7 pam pam-1.1.8-12.el7_1.1.x86_64.rpm
pam pam-1.1.8-12.el7_1.1.i686.rpm
pam pam-1.1.8-12.el7_1.1.src.rpm
pam-devel pam-devel-1.1.8-12.el7_1.1.i686.rpm
pam-devel pam-devel-1.1.8-12.el7_1.1.x86_64.rpm