ID de Prueba:	1.3.6.1.4.1.25623.1.0.69190
Categoría:	Red Hat Local Security Checks
Título:	RedHat Security Advisory RHSA-2010:0891
Resumen:	NOSUMMARY
Descripción:	Description: The remote host is missing updates announced in advisory RHSA-2010:0891. 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. Solution: Please note that this update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date http://rhn.redhat.com/errata/RHSA-2010-0891.html http://www.redhat.com/security/updates/classification/#moderate Risk factor : High CVSS Score: 6.9
Referencia Cruzada:	Common Vulnerability Exposure (CVE) ID: CVE-2010-3316 20110308 VMSA-2011-0004 VMware ESX/ESXi SLPD denial of service vulnerability and ESX third party updates for Service Console packages bind, pam, and rpm. http://www.securityfocus.com/archive/1/516909/100/0/threaded 49711 http://secunia.com/advisories/49711 ADV-2011-0606 http://www.vupen.com/english/advisories/2011/0606 GLSA-201206-31 http://security.gentoo.org/glsa/glsa-201206-31.xml MDVSA-2010:220 http://www.mandriva.com/security/advisories?name=MDVSA-2010:220 RHSA-2010:0819 http://www.redhat.com/support/errata/RHSA-2010-0819.html RHSA-2010:0891 http://www.redhat.com/support/errata/RHSA-2010-0891.html [oss-security] 20100816 Minor security flaw with pam_xauth http://openwall.com/lists/oss-security/2010/08/16/2 [oss-security] 20100921 Re: Minor security flaw with pam_xauth http://openwall.com/lists/oss-security/2010/09/21/3 http://openwall.com/lists/oss-security/2010/09/21/8 [oss-security] 20100924 Re: Minor security flaw with pam_xauth http://www.openwall.com/lists/oss-security/2010/09/24/2 [oss-security] 20100927 Re: Minor security flaw with pam_xauth http://openwall.com/lists/oss-security/2010/09/27/4 http://openwall.com/lists/oss-security/2010/09/27/5 [oss-security] 20100928 Re: Minor security flaw with pam_xauth http://openwall.com/lists/oss-security/2010/09/27/10 http://openwall.com/lists/oss-security/2010/09/27/7 [oss-security] 20101025 Re: Minor security flaw with pam_xauth http://openwall.com/lists/oss-security/2010/10/25/2 [security-announce] 20110307 VMSA-2011-0004 VMware ESX/ESXi SLPD denial of service vulnerability and ESX third party updates for Service Console packages bind, pam, and rpm http://lists.vmware.com/pipermail/security-announce/2011/000126.html http://git.altlinux.org/people/ldv/packages/?p=pam.git%3Ba=commit%3Bh=06f882f30092a39a1db867c9744b2ca8d60e4ad6 http://www.vmware.com/security/advisories/VMSA-2011-0004.html https://bugzilla.redhat.com/show_bug.cgi?id=637898 https://sourceforge.net/tracker/?func=detail&aid=3028213&group_id=6663&atid=106663 Common Vulnerability Exposure (CVE) ID: CVE-2010-3435 http://openwall.com/lists/oss-security/2010/09/27/8 https://bugzilla.redhat.com/show_bug.cgi?id=641335 Common Vulnerability Exposure (CVE) ID: CVE-2010-3853 http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/modules/pam_namespace/pam_namespace.c?view=log#rev1.13 https://bugzilla.redhat.com/show_bug.cgi?id=643043
Copyright	Copyright (c) 2011 E-Soft Inc. http://www.securityspace.com

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