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Vulnerability Details : CVE-2020-27674

An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.
Publish Date : 2020-10-22 Last Update Date : 2022-04-26
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- CVSS Scores & Vulnerability Types

CVSS Score
4.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Gain privileges
CWE ID 787

- Products Affected By CVE-2020-27674

# 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 Fedoraproject Fedora 32 * * * Version Details Vulnerabilities
4 OS Fedoraproject Fedora 33 * * * 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 3
XEN XEN 1

- References For CVE-2020-27674

http://www.openwall.com/lists/oss-security/2021/01/19/5
MLIST [oss-security] 20210119 Xen Security Advisory 286 v6 (CVE-2020-27674) - x86 PV guest INVLPG-like flushes may leave stale TLB entries
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
FEDORA FEDORA-2020-6dd36a716c
https://xenbits.xen.org/xsa/advisory-286.html
https://security.gentoo.org/glsa/202011-06
GENTOO GLSA-202011-06
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3U4LNKKXU4UP4Z5XP6TMIWSML3QODPE/
FEDORA FEDORA-2020-5398bfb466
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PZAM3LYJ5TZLSSNL3KXFILM46QKVTOUA/
FEDORA FEDORA-2020-ec84c1565b
https://www.debian.org/security/2020/dsa-4804
DEBIAN DSA-4804

- Metasploit Modules Related To CVE-2020-27674

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


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