diff options
Diffstat (limited to 'security/vuxml/vuln.xml')
| -rw-r--r-- | security/vuxml/vuln.xml | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/security/vuxml/vuln.xml b/security/vuxml/vuln.xml index 354b5c61c714..e0485b044def 100644 --- a/security/vuxml/vuln.xml +++ b/security/vuxml/vuln.xml @@ -58,6 +58,44 @@ Notes: * Do not forget port variants (linux-f10-libxml2, libxml2, etc.) --> <vuxml xmlns="http://www.vuxml.org/apps/vuxml-1"> + <vuln vid="80a897a2-c1a6-11e6-ae1b-002590263bf5"> + <topic>xen-kernel -- x86 CMPXCHG8B emulation fails to ignore operand size override</topic> + <affects> + <package> + <name>xen-kernel</name> + <range><lt>4.7.1_1</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-200.html"> + <p>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.</p> + <p>A malicious unprivileged guest may be able to obtain sensitive + information from the host.</p> + </blockquote> + </body> + </description> + <references> + <cvename>CVE-2016-9932</cvename> + <url>http://xenbits.xen.org/xsa/advisory-200.html</url> + </references> + <dates> + <discovery>2016-12-13</discovery> + <entry>2016-12-14</entry> + </dates> + </vuln> + <vuln vid="2d56308b-c0a8-11e6-a9a5-b499baebfeaf"> <topic>PHP -- Multiple vulnerabilities</topic> <affects> |