svn commit: r492661 - head/security/vuxml
Mark Felder
feld at FreeBSD.org
Mon Feb 11 00:11:42 UTC 2019
Author: feld
Date: Mon Feb 11 00:11:41 2019
New Revision: 492661
URL: https://svnweb.freebsd.org/changeset/ports/492661
Log:
Document FreeBSD-SA-19:02.fd
Modified:
head/security/vuxml/vuln.xml
Modified: head/security/vuxml/vuln.xml
==============================================================================
--- head/security/vuxml/vuln.xml Mon Feb 11 00:10:58 2019 (r492660)
+++ head/security/vuxml/vuln.xml Mon Feb 11 00:11:41 2019 (r492661)
@@ -58,6 +58,43 @@ Notes:
* Do not forget port variants (linux-f10-libxml2, libxml2, etc.)
-->
<vuxml xmlns="http://www.vuxml.org/apps/vuxml-1">
+ <vuln vid="86c89abf-2d91-11e9-bf3e-a4badb2f4699">
+ <topic>FreeBSD -- File description reference count leak</topic>
+ <affects>
+ <package>
+ <name>FreeBSD-kernel</name>
+ <range><ge>12.0</ge><lt>12.0_3</lt></range>
+ </package>
+ </affects>
+ <description>
+ <body xmlns="http://www.w3.org/1999/xhtml">
+ <h1>Problem Description:</h1>
+ <p>FreeBSD 12.0 attempts to handle the case where the
+ receiving process does not provide a sufficiently large
+ buffer for an incoming control message containing rights.
+ In particular, to avoid leaking the corresponding descriptors
+ into the receiving process' descriptor table, the kernel
+ handles the truncation case by closing descriptors referenced
+ by the discarded message.</p>
+ <p>The code which performs this operation failed to release
+ a reference obtained on the file corresponding to a received
+ right. This bug can be used to cause the reference counter
+ to wrap around and free the file structure.</p>
+ <h1>Impact:</h1>
+ <p>A local user can exploit the bug to gain root privileges
+ or escape from a jail.</p>
+ </body>
+ </description>
+ <references>
+ <cvename>CVE-2019-5596</cvename>
+ <freebsdsa>SA-19:02.fd</freebsdsa>
+ </references>
+ <dates>
+ <discovery>2019-02-05</discovery>
+ <entry>2019-02-11</entry>
+ </dates>
+ </vuln>
+
<vuln vid="683c714d-2d91-11e9-bf3e-a4badb2f4699">
<topic>FreeBSD -- System call kernel data register leak</topic>
<affects>
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