Use-after-free in Linux kernel - CVE-2020-25670
Published: May 25, 2022
Vulnerability identifier: #VU63652
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-25670
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the NFC LLCP protocol implementation. A local user can perform manipulation with an unknown input for the llcp_sock_bind() function to crash or escalate their privileges on the system.
How to mitigate CVE-2020-25670
Install updates from vendor's website.
Sources
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PW3OASG7OEMHANDWBM5US5WKTOC76KMH/
- http://www.openwall.com/lists/oss-security/2020/11/01/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UTVACC6PGS6OSD3EYY7FZUAZT2EUMFH5/
- http://www.openwall.com/lists/oss-security/2021/05/11/4
- https://www.openwall.com/lists/oss-security/2020/11/01/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VEIEGQXUW37YHZ5MTAZTDCIMHUN26NJS/
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
- https://security.netapp.com/advisory/ntap-20210702-0008/