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CVE-2015-6564

Status Candidate

Overview

Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.

Related Files

Red Hat Security Advisory 2016-0741-01
Posted May 11, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0741-01 - OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server. Security Fix: It was found that the OpenSSH client did not properly enforce the ForwardX11Timeout setting. A malicious or compromised remote X application could possibly use this flaw to establish a trusted connection to the local X server, even if only untrusted X11 forwarding was requested.

tags | advisory, remote, local, protocol
systems | linux, redhat, unix
advisories | CVE-2015-5352, CVE-2015-6563, CVE-2015-6564, CVE-2016-1908
MD5 | 47cb9b4988f2bd49f622325736e076bd
Gentoo Linux Security Advisory 201512-04
Posted Dec 21, 2015
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201512-4 - Multiple vulnerabilities have been found in OpenSSH, the worst of which could lead to arbitrary code execution, or cause a Denial of Service condition. Versions less than 7.1_p1-r2 are affected.

tags | advisory, denial of service, arbitrary, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2015-5352, CVE-2015-5600, CVE-2015-6563, CVE-2015-6564, CVE-2015-6565
MD5 | b47a12dd6c6720d40e8d0a89de7dcbda
Red Hat Security Advisory 2015-2088-06
Posted Nov 20, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2088-06 - OpenSSH is OpenBSD's SSH protocol implementation. These packages include the core files necessary for both the OpenSSH client and server. A flaw was found in the way OpenSSH handled PAM authentication when using privilege separation. An attacker with valid credentials on the system and able to fully compromise a non-privileged pre-authentication process using a different flaw could use this flaw to authenticate as other users. A use-after-free flaw was found in OpenSSH. An attacker able to fully compromise a non-privileged pre-authentication process using a different flaw could possibly cause sshd to crash or execute arbitrary code with root privileges.

tags | advisory, arbitrary, root, protocol
systems | linux, redhat, openbsd
advisories | CVE-2015-5600, CVE-2015-6563, CVE-2015-6564
MD5 | ad8e3bf7c82c570e9806fc41b7c33270
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