GSD-2023-1000863 ksmbd: check nt_len to be at least CIFS_ENCPWD_SIZE in ksmbd_decode_ntlmssp_auth_blob
An integer overflow in the Linux kernel's ksmbd SMB server allows remote attackers to cause a denial of service via crafted NTLMSSP authentication blobs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2023-1000863?
GSD-2023-1000863 is a vulnerability in Kernel, published on 17 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
ksmbd: check nt_len to be at least CIFS_ENCPWD_SIZE in ksmbd_decode_ntlmssp_auth_blob
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 v5.15.87 by commit e32f867b37da7902685c9a106bef819506aa1a92, it was introduced in version v5.15 by commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9. For more details please see the references link.
Which versions are affected by GSD-2023-1000863?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1000863?
No fix has been published for GSD-2023-1000863 yet. Limit exposure of the affected software until one is available.
Is GSD-2023-1000863 being exploited?
There is no known exploitation of GSD-2023-1000863 in the wild and no public exploit code.