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5.3
CVSSv3

CVE-2020-27674

Published: 22/10/2020 Updated: 07/11/2023
CVSS v2 Base Score: 4.6 | Impact Score: 6.4 | Exploitability Score: 3.9
CVSS v3 Base Score: 5.3 | Impact Score: 3.4 | Exploitability Score: 1.8
VMScore: 409
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
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Vulnerability Summary

An issue exists in Xen up to and including 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.

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debian debian linux 10.0

Vendor Advisories

Debian Security Advisories: DSA-4804-1 xen -- security update
Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, privilege escalation or information leaks For the stable distribution (buster), these problems have been fixed in version 4114+57-g41a822c392-1 We recommend that you upgrade your xen packages For the detailed security status of xen ple ...
Citrix Security Bulletins: Citrix Hypervisor Security Update
Description of Problem Several security issues have been identified in Citrix Hypervisor (formerly Citrix XenServer) that may allow: unprivileged code in a PV guest VM to compromise that PV guest VM privileged code in a guest VM to cause the host to crash or become unresponsive privileged code in an HVM guest VM, to which the host administrator has ...

References

CWE-787https://xenbits.xen.org/xsa/advisory-286.htmlhttps://security.gentoo.org/glsa/202011-06https://www.debian.org/security/2020/dsa-4804http://www.openwall.com/lists/oss-security/2021/01/19/5https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3U4LNKKXU4UP4Z5XP6TMIWSML3QODPE/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZAM3LYJ5TZLSSNL3KXFILM46QKVTOUA/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/https://nvd.nist.govhttps://www.debian.org/security/2020/dsa-4804
CVSSv3
CVSSv2
CVSSv3
VMScore
Recommendations:
CVE-2023-21991CVE-2024-32674path traversalCVE-2023-21987denial of servicedosCVE-2024-4647CVE-2024-25519CVE-2024-33612
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