cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message
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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/60480291c1fcafad8425d93f771b5bcc2bd398b4
- https://git.kernel.org/stable/c/9312e04b6c6bc46354ecd0cc82052a2b3df0b529
- https://git.kernel.org/stable/c/943eb0ede74ecd609fdfd3f0b83e0d237613e526
- https://git.kernel.org/stable/c/d0050ec3ebbcb3451df9a65b8460be9b9e02e80c
- https://git.kernel.org/stable/c/e98ecc6e94f4e6d21c06660b0f336df02836694f
- https://git.kernel.org/stable/c/fada9b8c95c77bb46b89e18117405bc90fce9f74
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50859.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-50859