GSD-2021-1000981 netfilter: synproxy: Fix out of bounds when parsing TCP options
An out-of-bounds read in the Linux kernel's netfilter synproxy module allows attackers to cause denial of service or potentially execute code via crafted TCP packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000981?
GSD-2021-1000981 is a memory corruption vulnerability in Kernel, published on 30 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
netfilter: synproxy: Fix out of bounds when parsing TCP options
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 v5.10.46 by commit 9cdf299ba4e153b5e56187648420de22c6216f02, it was introduced in version v3.12 by commit 48b1de4c110a7afa4b85862f6c75af817db26fad. For more details please see the references link.
Which versions are affected by GSD-2021-1000981?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000981?
No fix has been published for GSD-2021-1000981 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is GSD-2021-1000981 being exploited?
There is no known exploitation of GSD-2021-1000981 in the wild and no public exploit code.