Novell NetWare NFS changes "Read Only" programs to setuid root
| netware-nfs-file-ownership (7246) |  High Risk |
Description:
Novell NetWare NFS modes 1 and 2 for Unix could allow an attacker to gain root privileges, caused by a vulnerability in the file ownership of "Read Only" programs. An attacker can create a "Read Only" program to cause NetWare NFS to change the permissions of the program to setuid root. This allows the attacker to gain root privileges on the system.
Consequences:
Gain Privileges
Remedy:
Apply the NFS205.exe patch, as listed in Novell Technical Information Document 2940551. See References.
— OR —
Apply any NFS patch that contains a UNIXLIB.NLM later than version 5.04r. See References.
References:
- BugTraq Mailing List, Thu, 8 Jan 1998 10:16:44 -0500: NetWare NFS.
- Novell Technical Information Document 2940551: Ownership of file changing to root in NFS.
- CVE-1999-1382: NetWare NFS mode 1 and 2 implements the Read Only flag in Unix by changing the ownership of a file to root, which allows local users to gain root privileges by creating a setuid program and setting it to Read Only
- OSVDB ID: 11012: Novell NetWare NFS Read Only Unix Flag Local Privilege Escalation
Platforms Affected:
- Novell NetWare
Reported:
Jan 08, 1998
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