20730 : NetBSD procfs Negative uio_offset Unspecified Issue
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
4	352	over 6 years ago	over 3 years ago	0 times	90%

Timeline

Disclosure Date
2005-10-31

Description

NetBSD contains a flaw related to the process file system (procfs) that may allow a malicious user to cause a negative uio_offset. No further details have been provided.

Classification

Location: Local Access Required, Location Unknown
Attack Type: Denial of Service, Information Disclosure, Attack Type Unknown
Impact: Loss of Confidentiality, Loss of Availability
Exploit: Exploit Unknown
Disclosure: OSVDB Verified

Technical

While specific details regarding this vulnerability were not provided by the vendor, a negative offset should not be permitted when using the process file system (procfs).

If a malicious user causes a negative offset when reading from a procfs file, a system crash and/or kernel memory disclosure will result. Such memory might contain sensitive information, such as portions of the file cache or terminal buffers. This information might be directly useful, or it might be leveraged to obtain elevated privileges in some way. For example, a terminal buffer might include a user-entered password.

Solution

Upgrade to version 2.0.3 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

NetBSD Foundation, Inc.	NetBSD	0.9
		1.0
		1.1
		1.2
		1.2.x
		1.3
		1.3.x
		1.4
		1.4.X
		1.5
		1.5.x
		1.6
		1.6.1
		1.6.2
		2.0
		2.0.1
		2.0.2

References

Security Tracker: 1015132
Related OSVDB ID: 20725 20726 20727 20728 20729 20731
Vendor Specific Advisory URL: http://mail-index.netbsd.org/netbsd-announce/2005/10/31/0000.html
Vendor URL: http://www.netbsd.org/
Other Advisory URL: http://www.uniras.gov.uk/niscc/docs/br-20051101-00969.html?lang=en

Credit

Unknown or Incomplete

CVSSv2 Score

We currently have no CVSS2 data on this vulnerability. Feel free to suggest it.

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

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