Type Confusion in Linux kernel - CVE-2022-34918
Published: July 15, 2022 / Updated: July 2, 2023
Vulnerability identifier: #VU65360
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:A/U:Clear
CVE-ID: CVE-2022-34918
CWE-ID: CWE-843
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
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 in the Linux kernel’s Netfilter subsystem in the way a user provides incorrect input of the NFT_DATA_VERDICT type. A local user can pass specially crafted data to the application, trigger a type confusion error and escalate privileges on the system.
How to mitigate CVE-2022-34918
Install updates from vendor's website.
Sources
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6
- https://www.openwall.com/lists/oss-security/2022/07/02/3
- https://lore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452@randorisec.fr/T/#u
- http://www.openwall.com/lists/oss-security/2022/07/05/1