Patch  oval:com.redhat.rhsa:def:20100891
RHSA-2010:0891: pam security update (Moderate)  

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.
Create Date: 2010-11-16 Last Update Date: 2010-11-16

Affected Platforms/Products

Affected Products (CPE + CVE references)
Platforms: unix (from OVAL definitions)
  • Red Hat Enterprise Linux 6

References

Criteria

The patch should be installed
IF : All of the following are true
IF : Any one of the following are true
IF : All of the following are true
IF : pam-devel is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  pam-devel is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20050805003 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : pam-devel is earlier than 0:1.1.1-4.el6_0.1
Linux : RPM Test :  pam-devel is earlier than 0:1.1.1-4.el6_0.1 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20050805003 (Object depth limit may be exceeded) !!!
RPM Version less than 0:1.1.1-4.el6_0.1 (datatype=evr_string)
linux : rpminfo_state 
IF : All of the following are true
IF : pam is earlier than 0:1.1.1-4.el6_0.1
Linux : RPM Test :  pam is earlier than 0:1.1.1-4.el6_0.1 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20050805002 (Object depth limit may be exceeded) !!!
RPM Version less than 0:1.1.1-4.el6_0.1 (datatype=evr_string)
linux : rpminfo_state 
IF : pam is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  pam is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20050805002 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : Any one of the following are true
IF : Red Hat Enterprise Linux 6 ComputeNode is installed
Linux : RPM Test :  Red Hat Enterprise Linux 6 ComputeNode is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842004 (Object depth limit may be exceeded) !!!
version pattern match ^6[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 6 Workstation is installed
Linux : RPM Test :  Red Hat Enterprise Linux 6 Workstation is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842003 (Object depth limit may be exceeded) !!!
version pattern match ^6[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 6 Server is installed
Linux : RPM Test :  Red Hat Enterprise Linux 6 Server is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842002 (Object depth limit may be exceeded) !!!
version pattern match ^6[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 6 Client is installed
Linux : RPM Test :  Red Hat Enterprise Linux 6 Client is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842001 (Object depth limit may be exceeded) !!!
version pattern match ^6[^\d]
linux : rpminfo_state 

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