cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 85% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message
Commit d5c7076b772a ("smb3: add smb3.1.1 to default dialect list")
extend the dialects from 3 to 4, but forget to decrease the extended
length when specific the dialect, then the message length is larger
than expected.
This maybe leak some info through network because not initialize the
message body.
After apply this patch, the VALIDATE_NEGOTIATE_INFO message length is
reduced from 28 bytes to 26 bytes.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/60480291c1fcafad8425d93f771b5bcc2bd398b4https://git.kernel.org/stable/c/9312e04b6c6bc46354ecd0cc82052a2b3df0b529https://git.kernel.org/stable/c/943eb0ede74ecd609fdfd3f0b83e0d237613e526https://git.kernel.org/stable/c/d0050ec3ebbcb3451df9a65b8460be9b9e02e80chttps://git.kernel.org/stable/c/e98ecc6e94f4e6d21c06660b0f336df02836694fhttps://git.kernel.org/stable/c/fada9b8c95c77bb46b89e18117405bc90fce9f74