Vulnerability Report

CVE-2020-27670

Title: Xen AMD IOMMU page-table entry half-update

DoS, Information Disclosure, Privilege Escalation

Proof Of Concept

No public PoC currently indexed for CVE-2020-27670.

CWE Category CWE-345
Published Date Oct 22, 2020
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 7.8 CVSS v3.1
Exploit Probability (EPSS)
0.25%

Vulnerability Summary

CVE-2020-27670: An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because an AMD IOMMU page-table entry can be half-updated.

Impacted Vendors

X
xen 1
F
fedoraproject 1
G
gowondesigns 1
O
opensuse 1
D
debian 1
C
cisco 1
R
redhat 1
X
xensource_inc 1

Reference Links

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html http://www.openwall.com/lists/oss-security/2021/01/19/9 http://xenbits.xen.org/xsa/advisory-347.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/ https://security.gentoo.org/glsa/202011-06 https://www.debian.org/security/2020/dsa-4804 https://xenbits.xen.org/xsa/advisory-347.html http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html http://www.openwall.com/lists/oss-security/2021/01/19/9 http://xenbits.xen.org/xsa/advisory-347.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/ https://security.gentoo.org/glsa/202011-06 https://www.debian.org/security/2020/dsa-4804 https://xenbits.xen.org/xsa/advisory-347.html
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
6.9
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:L/AC:M/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2020-27670 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected Stack

No specific products linked.