#VU33056 Heap-based buffer overflow in Xen - CVE-2014-8106

Vulnerability identifier: #VU33056

Vulnerability risk: Medium

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

CVE-ID: CVE-2014-8106

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Heap-based buffer overflow in the Cirrus VGA emulator (hw/display/cirrus_vga.c) in QEMU before 2.2.0. A remote attacker can use vectors related to blit regions. NOTE to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Update to version 2.2.0.

Vulnerable software versions

Xen: 2.0 - 2.0.6

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External links
https://git.qemu.org/?p=qemu.git;a=commit;h=bf25983345ca44aec3dd92c57142be45452bd38a
https://git.qemu.org/?p=qemu.git;a=commit;h=d3532a0db02296e687711b8cdc7791924efccea0
https://lists.fedoraproject.org/pipermail/package-announce/2015-April/154656.html
https://lists.gnu.org/archive/html/qemu-devel/2014-12/msg00508.html
https://rhn.redhat.com/errata/RHSA-2015-0349.html
https://rhn.redhat.com/errata/RHSA-2015-0624.html
https://rhn.redhat.com/errata/RHSA-2015-0643.html
https://rhn.redhat.com/errata/RHSA-2015-0795.html
https://rhn.redhat.com/errata/RHSA-2015-0867.html
https://rhn.redhat.com/errata/RHSA-2015-0868.html
https://rhn.redhat.com/errata/RHSA-2015-0891.html
https://secunia.com/advisories/60364
https://support.citrix.com/article/CTX200892
https://www.debian.org/security/2014/dsa-3087
https://www.debian.org/security/2014/dsa-3088
https://www.openwall.com/lists/oss-security/2014/12/04/8
https://www.securityfocus.com/bid/71477
https://exchange.xforce.ibmcloud.com/vulnerabilities/99126

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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