CVE-2020-29568

MEDIUM6.5

An issue was discovered in Xen through 4

Published Dec 15, 2020

Modified 1 years ago

Details

An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.

References

WEBhttps://lists.debian.org/debian-lts-announce/2021/02/msg00018.html WEBhttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.html ADVISORYhttps://security.gentoo.org/glsa/202107-30 ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2020-29568 ADVISORYhttps://www.debian.org/security/2021/dsa-4843 WEBhttps://xenbits.xenproject.org/xsa/advisory-349.html

CVSS Analysis

CVSS v3.1

6.5

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

ChangedS:C

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

6.5/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Ecosystems

Timeline

PublishedDec 15, 2020

ModifiedAug 4, 2024