CVE-2020-29569
CVSS V2 High 7.2
CVSS V3 High 8.8
Description
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.
Overview
- CVE ID
- CVE-2020-29569
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-12-15T17:15:14
- Last Modified Date
- 2023-01-19T15:53:51
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* | 1 | OR | 4.14.1 | |
| AND | ||||
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 5.10.1 | |
| AND | ||||
| cpe:2.3:o:netapp:hci_compute_node_bios:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:netapp:solidfire_\&_hci_storage_node:-:*:*:*:*:*:*:* | 1 | OR | ||
| AND | ||||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:C/I:C/A:C
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 7.2
- Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 10
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 8.8
- Base Severity
- HIGH
- Exploitability Score
- 2
- Impact Score
- 6
References
| Reference URL | Reference Tags |
|---|---|
| https://xenbits.xenproject.org/xsa/advisory-350.html | Patch Vendor Advisory |
| https://www.debian.org/security/2021/dsa-4843 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210205-0001/ | Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/202107-30 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-29569 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29569 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:26:30 | Added to TrackCVE | |||
| 2022-12-05 18:21:50 | 2020-12-15T17:15Z | 2020-12-15T17:15:14 | CVE Published Date | updated |
| 2022-12-05 18:21:50 | 2022-04-26T16:12:19 | CVE Modified Date | updated | |
| 2022-12-05 18:21:50 | Undergoing Analysis | Vulnerability Status | updated | |
| 2023-01-19 16:11:29 | 2023-01-19T15:53:51 | CVE Modified Date | updated | |
| 2023-01-19 16:11:29 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |