CVE-2020-29568

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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

https://xenbits.xenproject.org/xsa/advisory-349.html

https://www.debian.org/security/2021/dsa-4843

https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html

https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

Details

Source: MITRE

Published: 2020-12-15

Updated: 2021-07-21

Type: CWE-119

Risk Information

CVSS v2

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 6.5

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

Impact Score: 4

Exploitability Score: 2

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions up to 4.14.1 (inclusive)

Configuration 2

OR

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Tenable Plugins

View all (35 total)

IDNameProductFamilySeverity
148550Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9038)NessusOracle Linux Local Security Checks
medium
148549Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9037)NessusOracle Linux Local Security Checks
medium
148009Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4750-1)NessusUbuntu Local Security Checks
high
147983Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4749-1)NessusUbuntu Local Security Checks
high
147978Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4751-1)NessusUbuntu Local Security Checks
high
147975Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4748-1)NessusUbuntu Local Security Checks
high
147532Debian DLA-2586-1 : linux security updateNessusDebian Local Security Checks
high
146685SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0532-1)NessusSuSE Local Security Checks
high
146512Debian DLA-2557-1 : linux-4.19 security updateNessusDebian Local Security Checks
high
146511SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0452-1)NessusSuSE Local Security Checks
high
146476SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0437-1)NessusSuSE Local Security Checks
high
146474SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0438-1)NessusSuSE Local Security Checks
high
146470SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0434-1)NessusSuSE Local Security Checks
high
146406SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0427-1)NessusSuSE Local Security Checks
high
146366SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:0354-1)NessusSuSE Local Security Checks
high
146362SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0348-1)NessusSuSE Local Security Checks
high
146359SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0353-1)NessusSuSE Local Security Checks
high
146293openSUSE Security Update : the Linux Kernel (openSUSE-2021-241)NessusSuSE Local Security Checks
high
146248OracleVM 3.4 : Unbreakable / etc (OVMSA-2021-0005)NessusOracleVM Local Security Checks
medium
146217EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-1246)NessusHuawei Local Security Checks
medium
146096Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9030)NessusOracle Linux Local Security Checks
medium
146052Debian DSA-4843-1 : linux - security updateNessusDebian Local Security Checks
high
146047Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9025)NessusOracle Linux Local Security Checks
high
146045Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9024)NessusOracle Linux Local Security Checks
high
145700Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9023)NessusOracle Linux Local Security Checks
high
145567FreeBSD : FreeBSD -- Xen guests can triger backend Out Of Memory (5d91370b-61fd-11eb-b87a-901b0ef719ab)NessusFreeBSD Local Security Checks
medium
145546Xen OOM DoS (XSA-349)NessusMisc.
medium
145458Amazon Linux AMI : kernel (ALAS-2021-1477)NessusAmazon Linux Local Security Checks
high
145456Amazon Linux 2 : kernel (ALAS-2021-1588)NessusAmazon Linux Local Security Checks
high
145287openSUSE Security Update : the Linux Kernel (openSUSE-2021-75)NessusSuSE Local Security Checks
medium
144907Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9006)NessusOracle Linux Local Security Checks
high
144906Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9007)NessusOracle Linux Local Security Checks
high
144905Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9009)NessusOracle Linux Local Security Checks
high
144904Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9005)NessusOracle Linux Local Security Checks
high
144903Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9008)NessusOracle Linux Local Security Checks
high