#VU40964 Input validation error in Xen and Opensuse - CVE-2015-0361

Vulnerability identifier: #VU40964

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-2015-0361

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

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

Vendor: Xen Project
SUSE

Description

The vulnerability allows remote domains to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (system crash) via a crafted hypercall during HVM guest teardown.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Xen: 4.2.0 - 4.4.1

Opensuse: 4.2.0 - 13.2

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-January/148103.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-January/148241.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
https://www.securityfocus.com/bid/71882
https://www.securitytracker.com/id/1031498
https://xenbits.xen.org/xsa/advisory-116.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.