Date: Tue, 20 Dec 2016 03:13:20 +0000 (UTC) From: Jason Unovitch <junovitch@FreeBSD.org> To: ports-committers@freebsd.org, svn-ports-all@freebsd.org, svn-ports-head@freebsd.org Subject: svn commit: r428976 - head/security/vuxml Message-ID: <201612200313.uBK3DKC5031370@repo.freebsd.org>
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Author: junovitch Date: Tue Dec 20 03:13:20 2016 New Revision: 428976 URL: https://svnweb.freebsd.org/changeset/ports/428976 Log: Document Xen Security Advisory (XSA 204) Reported by: royger Security: CVE-2016-10013 Security: https://vuxml.FreeBSD.org/freebsd/942433db-c661-11e6-ae1b-002590263bf5.html Modified: head/security/vuxml/vuln.xml Modified: head/security/vuxml/vuln.xml ============================================================================== --- head/security/vuxml/vuln.xml Tue Dec 20 02:30:58 2016 (r428975) +++ head/security/vuxml/vuln.xml Tue Dec 20 03:13:20 2016 (r428976) @@ -58,6 +58,40 @@ Notes: * Do not forget port variants (linux-f10-libxml2, libxml2, etc.) --> <vuxml xmlns="http://www.vuxml.org/apps/vuxml-1">; + <vuln vid="942433db-c661-11e6-ae1b-002590263bf5"> + <topic>xen-kernel -- x86: Mishandling of SYSCALL singlestep during emulation</topic> + <affects> + <package> + <name>xen-kernel</name> + <range><lt>4.7.1_2</lt></range> + </package> + </affects> + <description> + <body xmlns="http://www.w3.org/1999/xhtml">; + <p>The Xen Project reports:</p> + <blockquote cite="http://xenbits.xen.org/xsa/advisory-204.html">; + <p>The typical behaviour of singlestepping exceptions is determined at + the start of the instruction, with a #DB trap being raised at the + end of the instruction. SYSCALL (and SYSRET, although we don't + implement it) behave differently because the typical behaviour + allows userspace to escalate its privilege. (This difference in + behaviour seems to be undocumented.) Xen wrongly raised the + exception based on the flags at the start of the instruction.</p> + <p>Guest userspace which can invoke the instruction emulator can use + this flaw to escalate its privilege to that of the guest kernel.</p> + </blockquote> + </body> + </description> + <references> + <cvename>CVE-2016-10013</cvename> + <url>http://xenbits.xen.org/xsa/advisory-204.html</url>; + </references> + <dates> + <discovery>2016-12-19</discovery> + <entry>2016-12-20</entry> + </dates> + </vuln> + <vuln vid="e47ab5db-c333-11e6-ae1b-002590263bf5"> <topic>atheme-services -- multiple vulnerabilities</topic> <affects>
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