CVE-2015-4163

Description

GNTTABOP_swap_grant_ref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service (NULL pointer dereference) via a hypercall without a GNTTABOP_setup_table or GNTTABOP_set_version.

4.9

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 0.10%

Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory xen.org

Affected: n/a n/a

References

Link	Tags
https://support.citrix.com/article/CTX206006
http://www.debian.org/security/2015/dsa-3286	vendor advisory
http://www.securityfocus.com/bid/75141	vdb entry
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00030.html	vendor advisory
http://support.citrix.com/article/CTX201145
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00007.html	vendor advisory
http://xenbits.xen.org/xsa/advisory-134.html	vendor advisory
https://security.gentoo.org/glsa/201604-03	vendor advisory
http://www.securitytracker.com/id/1032568	vdb entry
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00004.html	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-4163?: CVE-2015-4163 has been scored as a medium severity vulnerability.
How to fix CVE-2015-4163?: To fix CVE-2015-4163, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-4163 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2015-4163 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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