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CVE-2010-3435

Status Candidate

Overview

The (1) pam_env and (2) pam_mail modules in Linux-PAM (aka pam) before 1.1.2 use root privileges during read access to files and directories that belong to arbitrary user accounts, which might allow local users to obtain sensitive information by leveraging this filesystem activity, as demonstrated by a symlink attack on the .pam_environment file in a user's home directory.

Related Files

Gentoo Linux Security Advisory 201206-31
Posted Jun 25, 2012
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201206-31 - Multiple vulnerabilities have been found in Linux-PAM, allowing local attackers to possibly gain escalated privileges, cause a Denial of Service, corrupt data, or obtain sensitive information. Versions less than 1.1.5 are affected.

tags | advisory, denial of service, local, vulnerability
systems | linux, gentoo
advisories | CVE-2010-3316, CVE-2010-3430, CVE-2010-3431, CVE-2010-3435, CVE-2010-3853, CVE-2010-4706, CVE-2010-4707, CVE-2010-4708, CVE-2011-3148, CVE-2011-3149
SHA-256 | 70b66584b8817a240db5a659f9e3fb27abfb44c6a46e9e68c554ca01bafc291f
Ubuntu Security Notice USN-1140-2
Posted Jun 1, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1140-2 - USN-1140-1 fixed vulnerabilities in PAM. A regression was found that caused cron to stop working with a "Module is unknown" error. As a result, systems configured with automatic updates will not receive updates until cron is restarted, these updates are installed or the system is rebooted. This update fixes the problem. Marcus Granado discovered that PAM incorrectly handled configuration files with non-ASCII usernames. A remote attacker could use this flaw to cause a denial of service, or possibly obtain login access with a different users username. This issue only affected Ubuntu 8.04 LTS. It was discovered that the PAM pam_xauth, pam_env and pam_mail modules incorrectly handled dropping privileges when performing operations. A local attacker could use this flaw to read certain arbitrary files, and access other sensitive information. It was discovered that the PAM pam_namespace module incorrectly cleaned the environment during execution of the namespace.init script. A local attacker could use this flaw to possibly gain privileges. It was discovered that the PAM pam_xauth module incorrectly handled certain failures. A local attacker could use this flaw to delete certain unintended files. It was discovered that the PAM pam_xauth module incorrectly verified certain file properties. A local attacker could use this flaw to cause a denial of service.

tags | advisory, remote, denial of service, arbitrary, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2010-3435
SHA-256 | 5d201859cf56d4bf364b41135aa2c9404cb69d1a53679b2460baf65020bf8b0f
Ubuntu Security Notice USN-1140-1
Posted May 30, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1140-1 - Marcus Granado discovered that PAM incorrectly handled configuration files with non-ASCII usernames. A remote attacker could use this flaw to cause a denial of service, or possibly obtain login access with a different users username. This issue only affected Ubuntu 8.04 LTS. It was discovered that the PAM pam_xauth, pam_env and pam_mail modules incorrectly handled dropping privileges when performing operations. A local attacker could use this flaw to read certain arbitrary files, and access other sensitive information. It was discovered that the PAM pam_namespace module incorrectly cleaned the environment during execution of the namespace.init script. A local attacker could use this flaw to possibly gain privileges. It was discovered that the PAM pam_xauth module incorrectly handled certain failures. A local attacker could use this flaw to delete certain unintended files. It was discovered that the PAM pam_xauth module incorrectly verified certain file properties. A local attacker could use this flaw to cause a denial of service.

tags | advisory, remote, denial of service, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2010-3435, CVE-2009-0887, CVE-2010-3316, CVE-2010-3430, CVE-2010-3431, CVE-2010-3435, CVE-2010-3853, CVE-2010-4706, CVE-2010-4707
SHA-256 | 1475b1ea584745e75607c08eb5e889073214913e719c51acce41d09dc235d52b
VMware Security Advisory 2011-0004
Posted Mar 8, 2011
Authored by VMware | Site vmware.com

VMware Security Advisory 2011-0004 - Service Location Protocol daemon (SLPD) denial of service issue and ESX 4.0 Service Console OS (COS) updates for bind, pam, and rpm.

tags | advisory, denial of service, protocol
advisories | CVE-2010-2059, CVE-2010-3316, CVE-2010-3435, CVE-2010-3609, CVE-2010-3613, CVE-2010-3614, CVE-2010-3762, CVE-2010-3853
SHA-256 | 719826a83686579aa0ee4f4f4daf886e176fc92fd4d140eec35f2f8d630f07d1
Mandriva Linux Security Advisory 2010-220
Posted Nov 5, 2010
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2010-220 - 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. The pam_mail module used root privileges while accessing users' files. In certain configurations, a local, unprivileged user could use this flaw to obtain limited information about files or directories that they do not have access to. 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.

tags | advisory, arbitrary, local, root
systems | linux, mandriva
advisories | CVE-2010-3316, CVE-2010-3435, CVE-2010-3853
SHA-256 | c75c1f0958b4914a5e219e8bcf5114e2f17ff93bf7a68433b923fa33342f579d
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