CVE-2020-29569

Published: Dic 15, 2020 Last Modified: Nov 21, 2024 EU-VD ID: EUVD-2020-21931 Aliases: GSD-2020-29569
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,8
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
HIGH 7,2
Source: [email protected]
Access Vector: local
Access Complexity: low
Authentication: none
Confidentiality: complete
Integrity: complete
Availability: complete

Description

AI Translation Available

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0007
Percentile
0,2th
Updated

EPSS Score Trend (Last 90 Days)

416

Use After Free

Stable
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Confidentiality
Potential Impacts:
Modify Memory Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
Operating System

Debian Linux by Debian

Product Information
Vendor Debian
Product Debian Linux
Version 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 4.11.9 (inclusive)
To 4.12 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 4.4.80 (inclusive)
To 4.4.254 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Hci Compute Node Bios by Netapp

Product Information
Vendor Netapp
Product Hci Compute Node Bios
Version -
cpe:2.3:o:netapp:hci_compute_node_bios:-:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 4.12 (inclusive)
To 4.14.213 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 4.9.36 (inclusive)
To 4.9.249 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Xen by Xen

Product Information
Vendor Xen
Product Xen
Version Range Affected
To 4.14.1 (inclusive)
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 4.15 (inclusive)
To 4.19.164 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 5.5 (inclusive)
To 5.10.4 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Solidfire \& Hci Storage Node by Netapp

Product Information
Vendor Netapp
Product Solidfire \& Hci Storage Node
Version -
cpe:2.3:a:netapp:solidfire_\&_hci_storage_node:-:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Solidfire \& Hci Management Node by Netapp

Product Information
Vendor Netapp
Product Solidfire \& Hci Management Node
Version -
cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Debian Linux by Debian

Product Information
Vendor Debian
Product Debian Linux
Version 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 4.1.44 (inclusive)
To 4.2 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 4.20 (inclusive)
To 5.4.86 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://lists.debian.org/debian-lts-announce/2021/02/msg000…
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
https://lists.debian.org/debian-lts-announce/2021/03/msg000…
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
https://security.gentoo.org/glsa/202107-30
Third Party Advisory
https://security.gentoo.org/glsa/202107-30
https://security.netapp.com/advisory/ntap-20210205-0001/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0001/
https://www.debian.org/security/2021/dsa-4843
Third Party Advisory
https://www.debian.org/security/2021/dsa-4843
https://xenbits.xenproject.org/xsa/advisory-350.html
Patch Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-350.html
https://lists.debian.org/debian-lts-announce/2021/02/msg000…
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
https://lists.debian.org/debian-lts-announce/2021/03/msg000…
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
https://security.gentoo.org/glsa/202107-30
Third Party Advisory
https://security.gentoo.org/glsa/202107-30
https://security.netapp.com/advisory/ntap-20210205-0001/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0001/
https://www.debian.org/security/2021/dsa-4843
Third Party Advisory
https://www.debian.org/security/2021/dsa-4843
https://xenbits.xenproject.org/xsa/advisory-350.html
Patch Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-350.html