2871 : OpenBSD semctl / semop Local Overflow DoS
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
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Timeline

Disclosure Date
2003-11-21

Description

A local overflow exists in two OpenBSD functions. The system fails to properly sanity check the semctl and semop system functions when a user-supplied semaphore set is handled. With a simple program, an attacker can cause a kernel panic and crash the system.

Classification

Attack Type: Denial of Service, Input Manipulation
Impact: Loss of Integrity, Loss of Availability

Solution

Install the 008_sem.patch provided by OpenBSD. A patch is required as there are no known workarounds.

Products

OpenBSD	OpenBSD	3.3
		3.4

References

Secunia Advisory ID: 10309
ISS X-Force ID: 13811
Bugtraq ID: 9086
Vendor Specific Solution URL: ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/008_sem.patch
Mail List Post: http://archives.neohapsis.com/archives/bugtraq/2003-11/0260.html
Vendor Specific Advisory URL: http://www.openbsd.org/errata.html

Credit

Unknown or Incomplete

CVSSv2 Score

NVD does not currently have a CVSSv2 score assigned.

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