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Vulnerability Details : CVE-2020-27671

An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because coalescing of per-page IOMMU TLB flushes is mishandled.
Publish Date : 2020-10-22 Last Update Date : 2022-04-26
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- CVSS Scores & Vulnerability Types

CVSS Score
6.9
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceGain privileges
CWE ID CWE id is not defined for this vulnerability

- Products Affected By CVE-2020-27671

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 31 * * * Version Details Vulnerabilities
3 OS Opensuse Leap 15.1 * * * Version Details Vulnerabilities
4 OS Opensuse Leap 15.2 * * * Version Details Vulnerabilities
5 OS XEN XEN * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 1
Fedoraproject Fedora 1
Opensuse Leap 2
XEN XEN 1

- References For CVE-2020-27671

http://xenbits.xen.org/xsa/advisory-346.html CONFIRM
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
FEDORA FEDORA-2020-6dd36a716c
http://www.openwall.com/lists/oss-security/2021/01/19/8
MLIST [oss-security] 20210119 Xen Security Advisory 346 v3 (CVE-2020-27671) - undue deferral of IOMMU TLB flushes
https://www.debian.org/security/2020/dsa-4804
DEBIAN DSA-4804
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html
SUSE openSUSE-SU-2020:1844
https://security.gentoo.org/glsa/202011-06
GENTOO GLSA-202011-06
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html
SUSE openSUSE-SU-2020:1783
https://xenbits.xen.org/xsa/advisory-346.html

- Metasploit Modules Related To CVE-2020-27671

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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