Permissions, Privileges, and Access Controls in Xen

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32658

Risk: Medium

CVSSv4.0: 5.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-2211

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote #AU# to execute arbitrary code.

The libxenlight (libxl) toolstack library in Xen 4.0.x, 4.1.x, and 4.2.x uses weak permissions for xenstore keys for paravirtualised and emulated serial console devices, which allows local guest administrators to modify the xenstore value via unspecified vectors.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Xen: 4.24

CPE2.3

• cpe:2.3:a:xen_project:xen:4.24:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
https://secunia.com/advisories/55082
https://security.gentoo.org/glsa/glsa-201309-24.xml
https://www.debian.org/security/2014/dsa-3006
https://www.openwall.com/lists/oss-security/2013/06/25/1
https://www.openwall.com/lists/oss-security/2013/06/26/4

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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