PT-2014-7810 · Xen+1 · Xen+1

Andrei Lutas · Published 2014-10-02 · Updated 2024-06-15 · CVE-2014-7155

Positive Technologies (AI Summary)

CVSS v2.0

5.8

Medium

Base vector

AV:A/AC:L/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions Xen versions 4.4.x and earlier

Description The issue is related to the x86 emulate function in Xen, which does not properly check supervisor mode permissions. This allows local HVM users to cause a denial of service, resulting in a guest crash, or gain guest kernel mode privileges. The exploitation vectors involve specific instructions, including HLT, LGDT, LIDT, or LMSW.

Recommendations For Xen versions 4.4.x and earlier, consider restricting the use of the x86 emulate function until a patch is available. As a temporary workaround, limiting the execution of HLT, LGDT, LIDT, or LMSW instructions may help minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Weakness Enumeration

CWE-264

Related Identifiers

CVE-2014-7155

DSA-3041-1

OPENSUSE-SU-2014_1279-1

OPENSUSE-SU-2014_1281-1

OPENSUSE-SU-2024:10196-1

SUSE-SU-2015:0940-1

Affected Products

Suse

Xen

References · 179

• https://osv.dev/vulnerability/openSUSE-SU-2024:10196-1 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2014-7155 · Security Note
• https://bdu.fstec.ru/vul/2015-04319 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2014-7155 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2014-7155 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2014-7155 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2014-7155 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html · Vendor Advisory
• http://debian.org/security/2014/dsa-3041 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2014-7155 · Security Note
• http://xenbits.xen.org/xsa/advisory-105.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2014-7155 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html · Vendor Advisory