Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2016.1804
openssh security update
25 July 2016
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: openssh
Publisher: Debian
Operating System: Debian GNU/Linux 8
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-6210
Original Bulletin:
http://www.debian.org/security/2016/dsa-3626
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running openssh check for an updated version of the software for
their operating system.
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Debian Security Advisory DSA-3626-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
July 24, 2016 https://www.debian.org/security/faq
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Package : openssh
CVE ID : CVE-2016-6210
Debian Bug : 831902
Eddie Harari reported that the OpenSSH SSH daemon allows user
enumeration through timing differences when trying to authenticate
users. When sshd tries to authenticate a non-existing user, it will pick
up a fixed fake password structure with a hash based on the Blowfish
algorithm. If real users passwords are hashed using SHA256/SHA512, then
a remote attacker can take advantage of this flaw by sending large
passwords, receiving shorter response times from the server for
non-existing users.
For the stable distribution (jessie), this problem has been fixed in
version 1:6.7p1-5+deb8u3.
For the unstable distribution (sid), this problem has been fixed in
version 1:7.2p2-6.
We recommend that you upgrade your openssh packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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