The setup_cifs_sb function in fs/cifs/connect.c in the Linux kernel before 2.6.39 does not properly handle DFS referrals, which allows remote CIFS servers to cause a denial of service (system crash) by placing a referral at the root of a share.
CVSS Severity (version 2.0):
Impact Subscore: 6.9
Exploitability Subscore: 4.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Allows disruption of service
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Patch Information; Exploit
[oss-security] 20110914 Re: CVE request -- kernel: cifs: always do is_path_accessible check in cifs_mount