#VU40852 Input validation error in Xen and Fedora - CVE-2015-2751

Vulnerability identifier: #VU40852

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/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-2015-2751

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software
Fedora
Operating systems & Components / Operating system

Vendor: Xen Project
Fedoraproject

Description

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

Xen 4.3.x, 4.4.x, and 4.5.x, when using toolstack disaggregation, allows remote domains with partial management control to cause a denial of service (host lock) via unspecified domctl operations.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.3.0 - 4.5.0

Fedora: 4.3.0 - 21

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-April/154574.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-April/154579.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-April/155198.html
https://lists.opensuse.org/opensuse-security-announce/2015-05/msg00018.html
https://www.securityfocus.com/bid/73443
https://www.securitytracker.com/id/1031997
https://xenbits.xen.org/xsa/advisory-127.html
https://security.gentoo.org/glsa/201504-04

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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