7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.0004 Low
EPSS
Percentile
8.6%
Pluggable Authentication Modules (PAM) provide a system whereby
administrators can set up authentication policies without having to
recompile programs that handle authentication.
It was discovered that the pam_namespace module executed the external
script namespace.init with an unchanged environment inherited from an
application calling PAM. In cases where such an environment was untrusted
(for example, when pam_namespace was configured for setuid applications
such as su or sudo), a local, unprivileged user could possibly use this
flaw to escalate their privileges. (CVE-2010-3853)
It was discovered that the pam_env and pam_mail modules used root
privileges while accessing user’s files. A local, unprivileged user could
use this flaw to obtain information, from the lines that have the KEY=VALUE
format expected by pam_env, from an arbitrary file. Also, in certain
configurations, a local, unprivileged user using a service for which the
pam_mail module was configured for, could use this flaw to obtain limited
information about files or directories that they do not have access to.
(CVE-2010-3435)
Note: As part of the fix for CVE-2010-3435, this update changes the default
value of pam_env’s configuration option user_readenv to 0, causing the
module to not read user’s ~/.pam_environment configuration file by default,
as reading it may introduce unexpected changes to the environment of the
service using PAM, or PAM modules consulted after pam_env.
It was discovered that the pam_xauth module did not verify the return
values of the setuid() and setgid() system calls. A local, unprivileged
user could use this flaw to execute the xauth command with root privileges
and make it read an arbitrary input file. (CVE-2010-3316)
Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for
reporting the CVE-2010-3435 issue.
All pam users should upgrade to these updated packages, which contain
backported patches to correct these issues.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
RedHat | 6 | s390 | pam | < 1.1.1-4.el6_0.1 | pam-1.1.1-4.el6_0.1.s390.rpm |
RedHat | 6 | i686 | pam-debuginfo | < 1.1.1-4.el6_0.1 | pam-debuginfo-1.1.1-4.el6_0.1.i686.rpm |
RedHat | 6 | s390x | pam-debuginfo | < 1.1.1-4.el6_0.1 | pam-debuginfo-1.1.1-4.el6_0.1.s390x.rpm |
RedHat | 6 | ppc | pam-debuginfo | < 1.1.1-4.el6_0.1 | pam-debuginfo-1.1.1-4.el6_0.1.ppc.rpm |
RedHat | 6 | ppc | pam-devel | < 1.1.1-4.el6_0.1 | pam-devel-1.1.1-4.el6_0.1.ppc.rpm |
RedHat | 6 | s390 | pam-debuginfo | < 1.1.1-4.el6_0.1 | pam-debuginfo-1.1.1-4.el6_0.1.s390.rpm |
RedHat | 6 | ppc | pam | < 1.1.1-4.el6_0.1 | pam-1.1.1-4.el6_0.1.ppc.rpm |
RedHat | 6 | ppc64 | pam-devel | < 1.1.1-4.el6_0.1 | pam-devel-1.1.1-4.el6_0.1.ppc64.rpm |
RedHat | 6 | s390 | pam-devel | < 1.1.1-4.el6_0.1 | pam-devel-1.1.1-4.el6_0.1.s390.rpm |
RedHat | 6 | x86_64 | pam-debuginfo | < 1.1.1-4.el6_0.1 | pam-debuginfo-1.1.1-4.el6_0.1.x86_64.rpm |