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Fedora 22: 2015-11063 Critical: OpenSSH XSECURITY Bypass

fedora
Calendar Grey July 10, 2015
Dist Fedora Esm H88
Fedora 22 openssh patch addresses XSECURITY vulnerabilities and agent locking problems, improving both safety and interoperability.
This update brings security fix for two announced vulnerabilities

Summary

SSH (Secure SHell) is a program for logging into and executing

commands on a remote machine. SSH is intended to replace rlogin and

rsh, and to provide secure encrypted communications between two

untrusted hosts over an insecure network. X11 connections and

arbitrary TCP/IP ports can also be forwarded over the secure channel.

OpenSSH is OpenBSD's version of the last free version of SSH, bringing

it up to date in terms of security and features.

This package includes the core files necessary for both the OpenSSH

client and server. To make this package useful, you should also

install openssh-clients, openssh-server, or both.

Update Information:

This update brings security fix for two announced vulnerabilities. Namely XSECURITY restrictions bypass under certain conditions AND weakness of agent locking (ssh-add -x) to password guessing (more info in related bugs). It also provides new version of openssh-6.9 which is bringing many bugfixes and few new features with maintaining compatibility with previous version.

Topics%20covered

Topics Covered

security advisory update critical Fedora openssh XSECURITY agent locking

Change Log

* Wed Jul 1 2015 Jakub Jelen 6.9p1-1 + 0.9.3-6 - New upstream release (#1238253) - Increase limitation number of files which can be listed using glob in sftp - Correctly revert "PermitRootLogin no" option from upstream sources (#89216) * Wed Jun 24 2015 Jakub Jelen 6.8p1-9 + 0.9.3-5 - Allow socketcall(SYS_SHUTDOWN) for net_child on ix86 architecture * Thu Jun 18 2015 Fedora Release Engineering - 6.8p1-8.1 - Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild * Mon Jun 8 2015 Jakub Jelen 6.8p1-8 + 0.9.3-5 - Return stat syscall to seccomp filter (#1228323) * Wed Jun 3 2015 Jakub Jelen 6.8p1-7 + 0.9.3-5 - Handle pam_ssh_agent_auth memory, buffers and variable sizes (#1225106) * Thu May 28 2015 Jakub Jelen 6.8p1-6 + 0.9.3-5 - Resolve problem with pam_ssh_agent_auth after rebase (#1225106) - ssh-copy-id: tcsh doesnt work with multiline strings - Fix upstream memory problems - Add missing options in testmode output and manual pages - Provide LDIF version of LPK schema - Document required selinux boolean for working ssh-ldap-helper

References


[ 1 ] Bug #1238231 - CVE-2015-5352 openssh: XSECURITY restrictions bypass under certain conditions in ssh(1) https://bugzilla.redhat.com/show_bug.cgi?id=1238231 [ 2 ] Bug #1238238 - openssh: weakness of agent locking (ssh-add -x) to password guessing https://bugzilla.redhat.com/show_bug.cgi?id=1238238

Update Instructions

This update can be installed with the "yum" update program. Use su -c 'yum update openssh' at the command line. For more information, refer to "Managing Software with yum", available at .

Severity
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Name: openssh
Product: Fedora 22
Version: 6.9p1
Release: 1.fc22
URL: https://www.openssh.org/portable.html
Summary: An open source implementation of SSH protocol versions 1 and 2

Topics%20covered

Topics Covered

security advisory update critical Fedora openssh XSECURITY agent locking

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