CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS
Percentile
76.3%
CentOS Errata and Security Advisory CESA-2015:1640
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.
Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2015-August/083501.html
https://lists.centos.org/pipermail/centos-announce/2015-August/083502.html
Affected packages:
pam
pam-devel
Upstream details at:
https://access.redhat.com/errata/RHSA-2015:1640
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
CentOS | 6 | i686 | pam | < 1.1.1-20.el6_7.1 | pam-1.1.1-20.el6_7.1.i686.rpm |
CentOS | 6 | i686 | pam-devel | < 1.1.1-20.el6_7.1 | pam-devel-1.1.1-20.el6_7.1.i686.rpm |
CentOS | 6 | i686 | pam | < 1.1.1-20.el6_7.1 | pam-1.1.1-20.el6_7.1.i686.rpm |
CentOS | 6 | x86_64 | pam | < 1.1.1-20.el6_7.1 | pam-1.1.1-20.el6_7.1.x86_64.rpm |
CentOS | 6 | i686 | pam-devel | < 1.1.1-20.el6_7.1 | pam-devel-1.1.1-20.el6_7.1.i686.rpm |
CentOS | 6 | x86_64 | pam-devel | < 1.1.1-20.el6_7.1 | pam-devel-1.1.1-20.el6_7.1.x86_64.rpm |
CentOS | 7 | i686 | pam | < 1.1.8-12.el7_1.1 | pam-1.1.8-12.el7_1.1.i686.rpm |
CentOS | 7 | x86_64 | pam | < 1.1.8-12.el7_1.1 | pam-1.1.8-12.el7_1.1.x86_64.rpm |
CentOS | 7 | i686 | pam-devel | < 1.1.8-12.el7_1.1 | pam-devel-1.1.8-12.el7_1.1.i686.rpm |
CentOS | 7 | x86_64 | pam-devel | < 1.1.8-12.el7_1.1 | pam-devel-1.1.8-12.el7_1.1.x86_64.rpm |
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS
Percentile
76.3%