GSD-2021-1000091 netfilter: conntrack: Make global sysctls readonly in non-init netns
A vulnerability in the Linux kernel netfilter conntrack module allows privilege escalation by modifying global sysctls in non-init network namespaces.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000091?
GSD-2021-1000091 is a vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
netfilter: conntrack: Make global sysctls readonly in non-init netns
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.2 by commit 671c54ea8c7ff47bd88444f3fffb65bf9799ce43, it was introduced in version v5.7 by commit d0febd81ae77a0e13717f1412ff9589e43fc4f8b. For more details please see the references link.
Which versions are affected by GSD-2021-1000091?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000091?
No fix has been published for GSD-2021-1000091 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000091 being exploited?
There is no known exploitation of GSD-2021-1000091 in the wild and no public exploit code.