Title: Multiple Vendor mopd User Inputted Data Used as Format String Vulnerability
Severity: HIGH
Description:
A buffer overflow exists in the mopd daemon, shipped with a number of popular operating systems. By supplying a filename containing the proper format strings (% strings), it is possible for a remote attacker to overwrite values on the stack. It may be possible to use this capability to execute arbitrary code on the affected machine.
To check for a vulnerable version, it is possible to look in the mopProcessDL() function, in process.c. If the pfile[] buffer is declared to be 17 bytes, it is vulnerable.
Affected Products:
- NetBSD NetBSD 1.4.1 Alpha
- NetBSD NetBSD 1.4.1 SPARC
- NetBSD NetBSD 1.4.1 arm32
- NetBSD NetBSD 1.4.1 x86
- NetBSD NetBSD 1.4.2 Alpha
- NetBSD NetBSD 1.4.2 SPARC
- NetBSD NetBSD 1.4.2 arm32
- NetBSD NetBSD 1.4.2 x86
- OpenBSD OpenBSD 2.4.0
- OpenBSD OpenBSD 2.5.0
- OpenBSD OpenBSD 2.6.0
- OpenBSD OpenBSD 2.7.0
- RedHat PowerTools 6.0.0
- RedHat PowerTools 6.1.0
- RedHat PowerTools 6.2.0
References:
- NetBSD: NetBSD Security Page
- OpenBSD: OpenBSD Security Information
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