PT-2015-1969 · Qemu+3 · Qemu+3

Donghai Zhu · Published 2015-08-11 · Updated 2018-10-30 · CVE-2015-5166

Positive Technologies (AI Summary)

CVSS v2.0

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Xen versions 4.5.x and earlier QEMU (affected versions not specified)

Description The issue is related to insufficient access control in the QEMU component of the Xen hypervisor, allowing a local attacker to gain privileges by exploiting a use-after-free vulnerability. This can be achieved by unplugging a block device twice, which may enable the attacker to perform actions such as disconnecting block devices.

Recommendations For Xen versions 4.5.x and earlier, consider restricting access to the block device unplugging functionality until a patch is available. As a temporary workaround, avoid unplugging block devices twice in the affected QEMU component to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-264

Related Identifiers

BDU:2015-11315

CVE-2015-5166

MGASA-2016-0098

OPENSUSE-SU-2015_1964-1

OPENSUSE-SU-2015_2003-1

SUSE-SU-2015:1384-1

SUSE-SU-2015:1404-1

SUSE-SU-2015:1479-1

SUSE-SU-2015:1479-2

USN-2724-1

Affected Products

Qemu

Suse

Ubuntu

Xen

References · 135

• https://osv.dev/vulnerability/MGASA-2016-0098 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-September/165373.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-5165 · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-5166 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2016-0098.html · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2015:1384-1 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5165 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2015-5166 · Security Note
• https://osv.dev/vulnerability/CVE-2015-5166 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2015-5166 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2015-5166 · Vendor Advisory
• https://bdu.fstec.ru/vul/2015-11313 · Security Note
• https://ubuntu.com/security/CVE-2014-9718 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-2724-1 · Vendor Advisory
• http://xenbits.xen.org/xsa/advisory-139.html · Vendor Advisory