#VU41090 Input validation error in SUSE products - CVE-2014-8595

Vulnerability identifier: #VU41090

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2014-8595

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

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

Vendor: Debian
Xen Project
SUSE

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

arch/x86/x86_emulate/x86_emulate.c in Xen 3.2.1 through 4.4.x does not properly check privileges, which allows local HVM guest users to gain privileges or cause a denial of service (crash) via a crafted (1) CALL, (2) JMP, (3) RETF, (4) LCALL, (5) LJMP, or (6) LRET far branch instruction.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Debian Linux: 7.0

Xen: 3.2.1 - 7.0

Opensuse: 3.2.1 - 13.2

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External links
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
https://secunia.com/advisories/62537
https://secunia.com/advisories/62672
https://support.citrix.com/article/CTX200288
https://support.citrix.com/article/CTX201794
https://www.debian.org/security/2015/dsa-3140
https://www.securityfocus.com/bid/71151
https://xenbits.xen.org/xsa/advisory-110.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/98768
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.