CVE-2020-29568medium
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
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 148550 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9038) | Nessus | Oracle Linux Local Security Checks | medium |
| 148549 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9037) | Nessus | Oracle Linux Local Security Checks | medium |
| 148009 | Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4750-1) | Nessus | Ubuntu Local Security Checks | high |
| 147983 | Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4749-1) | Nessus | Ubuntu Local Security Checks | high |
| 147978 | Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4751-1) | Nessus | Ubuntu Local Security Checks | high |
| 147975 | Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4748-1) | Nessus | Ubuntu Local Security Checks | high |
| 147532 | Debian DLA-2586-1 : linux security update | Nessus | Debian Local Security Checks | high |
| 146685 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0532-1) | Nessus | SuSE Local Security Checks | high |
| 146512 | Debian DLA-2557-1 : linux-4.19 security update | Nessus | Debian Local Security Checks | high |
| 146511 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0452-1) | Nessus | SuSE Local Security Checks | high |
| 146476 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0437-1) | Nessus | SuSE Local Security Checks | high |
| 146474 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0438-1) | Nessus | SuSE Local Security Checks | high |
| 146470 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0434-1) | Nessus | SuSE Local Security Checks | high |
| 146406 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0427-1) | Nessus | SuSE Local Security Checks | high |
| 146366 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:0354-1) | Nessus | SuSE Local Security Checks | high |
| 146362 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0348-1) | Nessus | SuSE Local Security Checks | high |
| 146359 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0353-1) | Nessus | SuSE Local Security Checks | high |
| 146293 | openSUSE Security Update : the Linux Kernel (openSUSE-2021-241) | Nessus | SuSE Local Security Checks | high |
| 146248 | OracleVM 3.4 : Unbreakable / etc (OVMSA-2021-0005) | Nessus | OracleVM Local Security Checks | medium |
| 146217 | EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-1246) | Nessus | Huawei Local Security Checks | medium |
| 146096 | Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9030) | Nessus | Oracle Linux Local Security Checks | medium |
| 146052 | Debian DSA-4843-1 : linux - security update | Nessus | Debian Local Security Checks | high |
| 146047 | Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9025) | Nessus | Oracle Linux Local Security Checks | high |
| 146045 | Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9024) | Nessus | Oracle Linux Local Security Checks | high |
| 145700 | Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9023) | Nessus | Oracle Linux Local Security Checks | high |
| 145567 | FreeBSD : FreeBSD -- Xen guests can triger backend Out Of Memory (5d91370b-61fd-11eb-b87a-901b0ef719ab) | Nessus | FreeBSD Local Security Checks | medium |
| 145546 | Xen OOM DoS (XSA-349) | Nessus | Misc. | medium |
| 145458 | Amazon Linux AMI : kernel (ALAS-2021-1477) | Nessus | Amazon Linux Local Security Checks | high |
| 145456 | Amazon Linux 2 : kernel (ALAS-2021-1588) | Nessus | Amazon Linux Local Security Checks | high |
| 145287 | openSUSE Security Update : the Linux Kernel (openSUSE-2021-75) | Nessus | SuSE Local Security Checks | medium |
| 144907 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9006) | Nessus | Oracle Linux Local Security Checks | high |
| 144906 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9007) | Nessus | Oracle Linux Local Security Checks | high |
| 144905 | Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9009) | Nessus | Oracle Linux Local Security Checks | high |
| 144904 | Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9005) | Nessus | Oracle Linux Local Security Checks | high |
| 144903 | Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9008) | Nessus | Oracle Linux Local Security Checks | high |