Input validation error in Debian products - CVE-2014-8595
Published: November 19, 2014 / Updated: August 9, 2020
Vulnerability identifier: #VU41090
CSH Severity: Low
CVSS v4: 5.1 [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]
CVE-ID: CVE-2014-8595
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Xen
Opensuse
Debian Linux
Gentoo Linux
SUSE Linux
Fedora
xen
Opensuse
Debian Linux
Gentoo Linux
SUSE Linux
Fedora
xen
How to mitigate CVE-2014-8595
Install update from vendor's website.
xen - addressed in versions 4.4.1-7.fc21, 4.4.1-8.fc21, 4.4.1-9.fc21
External References
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
- http://secunia.com/advisories/62537
- http://secunia.com/advisories/62672
- http://support.citrix.com/article/CTX200288
- http://support.citrix.com/article/CTX201794
- http://www.debian.org/security/2015/dsa-3140
- http://www.securityfocus.com/bid/71151
- http://xenbits.xen.org/xsa/advisory-110.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/98768
- https://security.gentoo.org/glsa/201504-04