Date: Fri, 26 May 2017 12:25:36 +0000 (UTC) From: Mark Felder <feld@FreeBSD.org> To: ports-committers@freebsd.org, svn-ports-all@freebsd.org, svn-ports-head@freebsd.org Subject: svn commit: r441777 - head/security/vuxml Message-ID: <201705261225.v4QCPaqN002066@repo.freebsd.org>
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Author: feld Date: Fri May 26 12:25:36 2017 New Revision: 441777 URL: https://svnweb.freebsd.org/changeset/ports/441777 Log: Document FreeBSD-SA-17:04.ipfilter Modified: head/security/vuxml/vuln.xml Modified: head/security/vuxml/vuln.xml ============================================================================== --- head/security/vuxml/vuln.xml Fri May 26 12:24:33 2017 (r441776) +++ head/security/vuxml/vuln.xml Fri May 26 12:25:36 2017 (r441777) @@ -58,6 +58,48 @@ Notes: * Do not forget port variants (linux-f10-libxml2, libxml2, etc.) --> <vuxml xmlns="http://www.vuxml.org/apps/vuxml-1"> + <vuln vid="51d1282d-420e-11e7-82c5-14dae9d210b8"> + <topic>FreeBSD -- ipfilter(4) fragment handling panic</topic> + <affects> + <package> + <name>FreeBSD-kernel</name> + <range><ge>11.0</ge><lt>11.0_10</lt></range> + <range><ge>10.3</ge><lt>10.3_19</lt></range> + </package> + </affects> + <description> + <body xmlns="http://www.w3.org/1999/xhtml"> + <h1>Problem Description:</h1> + <p>ipfilter(4), capable of stateful packet inspection, using + the "keep state" or "keep frags" rule options, will not + only maintain the state of connections, such as TCP streams + or UDP communication, it also maintains the state of + fragmented packets. When a packet fragments are received + they are cached in a hash table (and linked list). When a + fragment is received it is compared with fragments already + cached in the hash table for a match. If it does not match + the new entry is used to create a new entry in the hash + table. If on the other hand it does match, unfortunately + the wrong entry is freed, the entry in the hash table. This + results in use after free panic (and for a brief moment + prior to the panic a memory leak due to the wrong entry + being freed).</p> + <h1>Impact:</h1> + <p>Carefully feeding fragments that are allowed to pass by + an ipfilter(4) firewall can be used to cause a panic followed + by reboot loop denial of service attack.</p> + </body> + </description> + <references> + <cvename>CVE-2017-1081</cvename> + <freebsdsa>SA-17:04.ipfilter</freebsdsa> + </references> + <dates> + <discovery>2017-04-27</discovery> + <entry>2017-05-26</entry> + </dates> + </vuln> + <vuln vid="3c0237f5-420e-11e7-82c5-14dae9d210b8"> <topic>FreeBSD -- Multiple vulnerabilities of ntp</topic> <affects>
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