Access of Resource Using Incompatible Type ('Type Confusion') Affecting kernel-rt-debug-kvm package, versions *
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTDEBUGKVM-3333852
- published 28 Feb 2023
- disclosed 4 Feb 2023
Introduced: 4 Feb 2023
CVE-2023-1076 Open this link in a new tabHow to fix?
There is no fixed version for Centos:8 kernel-rt-debug-kvm.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A flaw was found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a type confusion in their initialization function. While it will be often correct, as tuntap devices require CAP_NET_ADMIN, it may not always be the case, e.g., a non-root user only having that capability. This would make tun/tap sockets being incorrectly treated in filtering/routing decisions, possibly bypassing network filters.
References
- https://access.redhat.com/security/cve/CVE-2023-1076
- https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=66b2c338adce580dfce2199591e65e2bab889cff
- https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a096ccca6e503a5c575717ff8a36ace27510ab0a
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html