Buffer overflow in Xen

1) Buffer overflow

EUVDB-ID: #VU42620

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-2212

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vmx_set_uc_mode function in Xen 3.3 through 4.3, when disabling caches, allows local HVM guests with access to memory mapped I/O regions to cause a denial of service (CPU consumption and possibly hypervisor or guest kernel panic) via a crafted GFN range.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Xen: 3.3.0 - 4.3.0

CPE2.3

• cpe:2.3:a:xen_project:xen:3.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:xen_project:xen:3.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:xen_project:xen:3.3.2:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00010.html
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00011.html
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
https://www.openwall.com/lists/oss-security/2013/07/24/6
https://security.gentoo.org/glsa/201504-04

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.