Vulnerability Details CVE-2012-3495
The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 24.9%
CVSS Severity
CVSS v2 Score 6.1
References
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
- http://lists.xen.org/archives/html/xen-announce/2012-09/msg00001.html
- http://secunia.com/advisories/51413
- http://secunia.com/advisories/55082
- http://security.gentoo.org/glsa/glsa-201309-24.xml
- http://support.citrix.com/article/CTX134708
- http://wiki.xen.org/wiki/Security_Announcements#XSA-13_hypercall_physdev_get_free_pirq_vulnerability
- http://www.openwall.com/lists/oss-security/2012/09/05/6
- http://www.securityfocus.com/bid/55406
- http://www.securitytracker.com/id?1027480
- http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593
- https://security.gentoo.org/glsa/201604-03
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
- http://lists.xen.org/archives/html/xen-announce/2012-09/msg00001.html
- http://secunia.com/advisories/51413
- http://secunia.com/advisories/55082
- http://security.gentoo.org/glsa/glsa-201309-24.xml
- http://support.citrix.com/article/CTX134708
- http://wiki.xen.org/wiki/Security_Announcements#XSA-13_hypercall_physdev_get_free_pirq_vulnerability
- http://www.openwall.com/lists/oss-security/2012/09/05/6
- http://www.securityfocus.com/bid/55406
- http://www.securitytracker.com/id?1027480
- http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593
- https://security.gentoo.org/glsa/201604-03
Products affected by CVE-2012-3495
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cpe:2.3:a:citrix:xenserver:4.1
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cpe:2.3:a:citrix:xenserver:5.0
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cpe:2.3:a:citrix:xenserver:5.5
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cpe:2.3:a:citrix:xenserver:5.6
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cpe:2.3:a:citrix:xenserver:6.0
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cpe:2.3:a:citrix:xenserver:6.0.2
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cpe:2.3:o:xen:xen:4.1.0
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cpe:2.3:o:xen:xen:4.1.1
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cpe:2.3:o:xen:xen:4.1.2
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cpe:2.3:o:xen:xen:4.1.3