From owner-freebsd-security@freebsd.org Tue Jan 10 10:04:21 2017 Return-Path: Delivered-To: freebsd-security@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 90250CA8B13 for ; Tue, 10 Jan 2017 10:04:21 +0000 (UTC) (envelope-from 000.fbsd@quip.cz) Received: from elsa.codelab.cz (elsa.codelab.cz [94.124.105.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 55A3515B7 for ; Tue, 10 Jan 2017 10:04:20 +0000 (UTC) (envelope-from 000.fbsd@quip.cz) Received: from elsa.codelab.cz (localhost [127.0.0.1]) by elsa.codelab.cz (Postfix) with ESMTP id E861828437; Tue, 10 Jan 2017 11:04:17 +0100 (CET) Received: from illbsd.quip.test (ip-86-49-16-209.net.upcbroadband.cz [86.49.16.209]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by elsa.codelab.cz (Postfix) with ESMTPSA id B1CE92840C; Tue, 10 Jan 2017 11:04:16 +0100 (CET) Subject: Re: VuXML entry for openssh - 10.3 sshd in base vulnerable To: Xin Li , freebsd security Cc: d@delphij.net References: <586BA308.8060402@quip.cz> <586FB98F.2050500@quip.cz> From: Miroslav Lachman <000.fbsd@quip.cz> Message-ID: <5874B1A0.6060403@quip.cz> Date: Tue, 10 Jan 2017 11:04:16 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:42.0) Gecko/20100101 Firefox/42.0 SeaMonkey/2.39 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Jan 2017 10:04:21 -0000 Xin Li wrote on 2017/01/10 08:49: > > > On 1/6/17 07:36, Miroslav Lachman wrote: >> Miroslav Lachman wrote on 2017/01/03 14:11: >>> Security entries for base are in VuXML for some time so we are checking >>> it periodically. Now we have an alert for base sshd in 10.3-p14 and -15 >>> too. >>> >>> # pkg audit FreeBSD-10.3_15 >>> FreeBSD-10.3_15 is vulnerable: >>> openssh -- multiple vulnerabilities >>> CVE: CVE-2016-10010 >>> CVE: CVE-2016-10009 >>> WWW: >>> https://vuxml.FreeBSD.org/freebsd/2aedd15f-ca8b-11e6-a9a5-b499baebfeaf.html >>> >>> >>> 1 problem(s) in the installed packages found. >>> >>> >>> But there is no advisory on >>> https://www.freebsd.org/security/advisories.html for this problem. >>> >>> Is it false alarm? Or did I missed something? >> >> 3 days without reply... >> >> Please, can somebody from FreeBSD team clarify if sshd in base is >> vulnerable or not? > > The default configuration is not affected by CVE-2016-10010 because > privilege separation is enabled by default. > > Exploiting CVE-2016-10009 requires non-trivial control over both a SSH > server and ability to write file on the system running ssh-agent(1). > > We plan to issue an advisory soon, but most of users do not need to be > worried for the vulnerabilities as the sshd(8) vulnerability requires > deliberately weaken the configuration, and it's hard to exploit the > ssh-agent(1) vulnerability (if an attacker is able to exploit it, they > already have substantial control and there would be much easier attacks > than doing it over ssh-agent). > > Hope this helps. Thank you for this clarification. Miroslav Lachman