From owner-svn-ports-head@freebsd.org Wed Dec 14 02:45:55 2016 Return-Path: Delivered-To: svn-ports-head@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 E7B2AC74E11; Wed, 14 Dec 2016 02:45:55 +0000 (UTC) (envelope-from junovitch@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (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 9D111188A; Wed, 14 Dec 2016 02:45:55 +0000 (UTC) (envelope-from junovitch@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id uBE2jscj066497; Wed, 14 Dec 2016 02:45:54 GMT (envelope-from junovitch@FreeBSD.org) Received: (from junovitch@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id uBE2jsBF066495; Wed, 14 Dec 2016 02:45:54 GMT (envelope-from junovitch@FreeBSD.org) Message-Id: <201612140245.uBE2jsBF066495@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: junovitch set sender to junovitch@FreeBSD.org using -f From: Jason Unovitch Date: Wed, 14 Dec 2016 02:45:54 +0000 (UTC) To: ports-committers@freebsd.org, svn-ports-all@freebsd.org, svn-ports-head@freebsd.org Subject: svn commit: r428541 - head/security/vuxml X-SVN-Group: ports-head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-ports-head@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for the ports tree for head List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Dec 2016 02:45:56 -0000 Author: junovitch Date: Wed Dec 14 02:45:54 2016 New Revision: 428541 URL: https://svnweb.freebsd.org/changeset/ports/428541 Log: Document Xen Security Advisory (XSA 200) Reported by: royger Security: CVE-2016-9932 Security: https://vuxml.FreeBSD.org/freebsd/80a897a2-c1a6-11e6-ae1b-002590263bf5.html Modified: head/security/vuxml/vuln.xml Modified: head/security/vuxml/vuln.xml ============================================================================== --- head/security/vuxml/vuln.xml Wed Dec 14 02:38:04 2016 (r428540) +++ head/security/vuxml/vuln.xml Wed Dec 14 02:45:54 2016 (r428541) @@ -58,6 +58,44 @@ Notes: * Do not forget port variants (linux-f10-libxml2, libxml2, etc.) --> + + xen-kernel -- x86 CMPXCHG8B emulation fails to ignore operand size override + + + xen-kernel + 4.7.1_1 + + + + +

The Xen Project reports:

+
The x86 instruction CMPXCHG8B is supposed to ignore legacy operand + size overrides; it only honors the REX.W override (making it + CMPXCHG16B). So, the operand size is always 8 or 16. When support + for CMPXCHG16B emulation was added to the instruction emulator, + this restriction on the set of possible operand sizes was relied on + in some parts of the emulation; but a wrong, fully general, operand + size value was used for other parts of the emulation. As a result, + if a guest uses a supposedly-ignored operand size prefix, a small + amount of hypervisor stack data is leaked to the guests: a 96 bit + leak to guests running in 64-bit mode; or, a 32 bit leak to other + guests.
+
A malicious unprivileged guest may be able to obtain sensitive + information from the host.
+

+ + + + CVE-2016-9932 + http://xenbits.xen.org/xsa/advisory-200.html + + + 2016-12-13 + 2016-12-14 + + + PHP -- Multiple vulnerabilities