Test ID:	1.3.6.1.4.1.25623.1.0.703446
Category:	Debian Local Security Checks
Title:	Debian: Security Advisory (DSA-3446-1)
Summary:	The remote host is missing an update for the Debian 'openssh' package(s) announced via the DSA-3446-1 advisory.
Description:	Summary: The remote host is missing an update for the Debian 'openssh' package(s) announced via the DSA-3446-1 advisory. Vulnerability Insight: The Qualys Security team discovered two vulnerabilities in the roaming code of the OpenSSH client (an implementation of the SSH protocol suite). SSH roaming enables a client, in case an SSH connection breaks unexpectedly, to resume it at a later time, provided the server also supports it. The OpenSSH server doesn't support roaming, but the OpenSSH client supports it (even though it's not documented) and it's enabled by default. CVE-2016-0777 An information leak (memory disclosure) can be exploited by a rogue SSH server to trick a client into leaking sensitive data from the client memory, including for example private keys. CVE-2016-0778 A buffer overflow (leading to file descriptor leak), can also be exploited by a rogue SSH server, but due to another bug in the code is possibly not exploitable, and only under certain conditions (not the default configuration), when using ProxyCommand, ForwardAgent or ForwardX11. This security update completely disables the roaming code in the OpenSSH client. It is also possible to disable roaming by adding the (undocumented) option UseRoaming no to the global /etc/ssh/ssh_config file, or to the user configuration in ~ /.ssh/config, or by passing -oUseRoaming=no on the command line. Users with passphrase-less private keys, especially in non interactive setups (automated jobs using ssh, scp, rsync+ssh etc.) are advised to update their keys if they have connected to an SSH server they don't trust. More details about identifying an attack and mitigations will be available in the Qualys Security Advisory. For the oldstable distribution (wheezy), these problems have been fixed in version 1:6.0p1-4+deb7u3. For the stable distribution (jessie), these problems have been fixed in version 1:6.7p1-5+deb8u1. For the testing distribution (stretch) and unstable distribution (sid), these problems will be fixed in a later version. We recommend that you upgrade your openssh packages. Affected Software/OS: 'openssh' package(s) on Debian 7, Debian 8. Solution: Please install the updated package(s). CVSS Score: 4.6 CVSS Vector: AV:N/AC:H/Au:S/C:P/I:P/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2016-0777 http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html BugTraq ID: 80695 http://www.securityfocus.com/bid/80695 Bugtraq: 20160114 Qualys Security Advisory - Roaming through the OpenSSH client: CVE-2016-0777 and CVE-2016-0778 (Google Search) http://www.securityfocus.com/archive/1/537295/100/0/threaded Debian Security Information: DSA-3446 (Google Search) http://www.debian.org/security/2016/dsa-3446 http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176516.html http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176349.html http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175592.html http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175676.html FreeBSD Security Advisory: FreeBSD-SA-16:07 https://security.FreeBSD.org/advisories/FreeBSD-SA-16:07.openssh.asc http://seclists.org/fulldisclosure/2016/Jan/44 https://security.gentoo.org/glsa/201601-01 http://packetstormsecurity.com/files/135273/Qualys-Security-Advisory-OpenSSH-Overflow-Leak.html http://www.openwall.com/lists/oss-security/2016/01/14/7 http://www.securitytracker.com/id/1034671 SuSE Security Announcement: SUSE-SU-2016:0117 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00006.html SuSE Security Announcement: SUSE-SU-2016:0118 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00007.html SuSE Security Announcement: SUSE-SU-2016:0119 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00008.html SuSE Security Announcement: SUSE-SU-2016:0120 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00009.html SuSE Security Announcement: openSUSE-SU-2016:0127 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00013.html SuSE Security Announcement: openSUSE-SU-2016:0128 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00014.html http://www.ubuntu.com/usn/USN-2869-1 Common Vulnerability Exposure (CVE) ID: CVE-2016-0778 BugTraq ID: 80698 http://www.securityfocus.com/bid/80698
Copyright	Copyright (C) 2016 Greenbone AG

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