Date: Thu, 25 Feb 2021 02:33:10 +0000 (UTC) From: Philip Paeps <philip@FreeBSD.org> To: ports-committers@freebsd.org, svn-ports-all@freebsd.org, svn-ports-head@freebsd.org Subject: svn commit: r566519 - head/security/vuxml Message-ID: <202102250233.11P2XAax087715@repo.freebsd.org>
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Author: philip Date: Thu Feb 25 02:33:09 2021 New Revision: 566519 URL: https://svnweb.freebsd.org/changeset/ports/566519 Log: security/vuxml: add FreeBSD SA-21:06.xen Modified: head/security/vuxml/vuln.xml Modified: head/security/vuxml/vuln.xml ============================================================================== --- head/security/vuxml/vuln.xml Thu Feb 25 02:33:06 2021 (r566518) +++ head/security/vuxml/vuln.xml Thu Feb 25 02:33:09 2021 (r566519) @@ -78,6 +78,44 @@ Notes: * Do not forget port variants (linux-f10-libxml2, libxml2, etc.) --> <vuxml xmlns="http://www.vuxml.org/apps/vuxml-1">; + <vuln vid="5b8c6e1e-770f-11eb-b87a-901b0ef719ab"> + <topic>FreeBSD -- Xen grant mapping error handling issues</topic> + <affects> + <package> + <name>FreeBSD-kernel</name> + <range><ge>12.2</ge><lt>12.2_4</lt></range> + <range><ge>11.4</ge><lt>11.4_8</lt></range> + </package> + </affects> + <description> + <body xmlns="http://www.w3.org/1999/xhtml">; + <h1>Problem Description:</h1> + <p>Grant mapping operations often occur in batch hypercalls, where a + number of operations are done in a single hypercall, the success or + failure of each one reported to the backend driver, and the backend + driver then loops over the results, performing follow-up actions + based on the success or failure of each operation.</p> + <p>Unfortunately, when running in HVM/PVH mode, the FreeBSD backend + drivers mishandle this: Some errors are ignored, effectively implying + their success from the success of related batch elements. In other + cases, errors resulting from one batch element lead to further batch + elements not being inspected, and hence successful ones to not be + possible to properly unmap upon error recovery.</p> + <h1>Impact:</h1> + <p>A malicious or buggy frontend driver may be able to cause resource + leaks in the domain running the corresponding backend driver.</p> + </body> + </description> + <references> + <cvename>CVE-2021-26932</cvename> + <freebsdsa>SA-21:06.xen</freebsdsa> + </references> + <dates> + <discovery>2021-02-24</discovery> + <entry>2021-02-25</entry> + </dates> + </vuln> + <vuln vid="bba850fd-770e-11eb-b87a-901b0ef719ab"> <topic>FreeBSD -- jail_attach(2) relies on the caller to change the cwd</topic> <affects>
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