#VU32745 Input validation error in Xen - CVE-2012-3515

Vulnerability identifier: #VU32745

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2012-3515

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a local non-authenticated attacker to execute arbitrary code.

Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model's address space."

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.24

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External links
https://git.qemu.org/?p=qemu-stable-0.15.git;a=log
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00001.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00012.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00016.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00024.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00026.html
https://lists.opensuse.org/opensuse-security-announce/2012-09/msg00027.html
https://lists.opensuse.org/opensuse-security-announce/2012-10/msg00002.html
https://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
https://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
https://lists.opensuse.org/opensuse-updates/2012-09/msg00051.html
https://lists.xen.org/archives/html/xen-announce/2012-09/msg00003.html
https://rhn.redhat.com/errata/RHSA-2012-1233.html
https://rhn.redhat.com/errata/RHSA-2012-1234.html
https://rhn.redhat.com/errata/RHSA-2012-1235.html
https://rhn.redhat.com/errata/RHSA-2012-1236.html
https://rhn.redhat.com/errata/RHSA-2012-1262.html
https://rhn.redhat.com/errata/RHSA-2012-1325.html
https://secunia.com/advisories/50472
https://secunia.com/advisories/50528
https://secunia.com/advisories/50530
https://secunia.com/advisories/50632
https://secunia.com/advisories/50689
https://secunia.com/advisories/50860
https://secunia.com/advisories/50913
https://secunia.com/advisories/51413
https://secunia.com/advisories/55082
https://security.gentoo.org/glsa/glsa-201309-24.xml
https://support.citrix.com/article/CTX134708
https://wiki.xen.org/wiki/Security_Announcements#XSA-17_Qemu_VT100_emulation_vulnerability
https://www.debian.org/security/2012/dsa-2543
https://www.debian.org/security/2012/dsa-2545
https://www.openwall.com/lists/oss-security/2012/09/05/10
https://www.securityfocus.com/bid/55413
https://www.ubuntu.com/usn/USN-1590-1
https://security.gentoo.org/glsa/201604-03

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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.