CVE-2020-25669

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 26-05-2021 02:15

Last modified: - 13-05-2022 10:04

Total changes: - 4

Description

A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.

Common Vulnerability Scoring System (CVSS)

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

Low

Attack complexity

Local

Attack vector

High

Availability

High

Confidentiality

High

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

7.8

Base score

1.8

5.9

Exploitability score

Impact score

Verification logic

vendor=linux AND product=linux_kernel AND version=5.9.4

vendor=Debian AND product=debian_linux AND version=9.0

vendor=netapp AND product=cloud_backup AND version=-

vendor=netapp AND product=solidfire_\&_hci_management_node AND version=-

vendor=netapp AND product=solidfire_baseboard_management_controller AND version=-

AND

vendor=netapp AND product=h300s_firmware AND version=-

vendor=netapp AND product=h300s AND version=-

AND

vendor=netapp AND product=h500s_firmware AND version=-

vendor=netapp AND product=h500s AND version=-

AND

vendor=netapp AND product=h700s_firmware AND version=-

vendor=netapp AND product=h700s AND version=-

AND

vendor=netapp AND product=h300e_firmware AND version=-

vendor=netapp AND product=h300e AND version=-

AND

vendor=netapp AND product=h500e_firmware AND version=-

vendor=netapp AND product=h500e AND version=-

AND

vendor=netapp AND product=h700e_firmware AND version=-

vendor=netapp AND product=h700e AND version=-

AND

vendor=netapp AND product=h410s_firmware AND version=-

vendor=netapp AND product=h410s AND version=-

AND

vendor=netapp AND product=h410c_firmware AND version=-

vendor=netapp AND product=h410c AND version=-

Reference

https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7e
[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update-Mailing List, Third Party Advisory
[oss-security] 20201120 Re: CVE-2020-25669: Linux Kernel use-after-free in sunkbd_reinit-Exploit, Mailing List, Third Party Advisory
[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update-Mailing List, Third Party Advisory
[oss-security] 20201105 CVE-2020-25669: Linux Kernel use-after-free in sunkbd_reinit-Exploit, Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/11/05/2,
https://www.openwall.com/lists/oss-security/2020/11/20/5,
https://security.netapp.com/advisory/ntap-20210702-0006/

Keywords

CVE-2020-25669

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2020-25669

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures