6094 : Multiple BSD TCP RST DoS
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
23	1282	over 8 years ago	over 4 years ago	0 times	90%

Timeline

Disclosure Date
1998-10-13

Description

FreeBSD and OpenBSD contain a flaw that may allow a remote denial of service. The issue is triggered when a malicious user sends TCP RST packets to a victim system to terminate its connection, which takes advantage of FreeBSD and OpenBSD's interpretation of sequence numbers in RST packets, and will result in loss of availability for the platform.

Classification

Location: Remote / Network Access
Attack Type: Denial of Service
Impact: Loss of Availability
Exploit: Exploit Rumored
Disclosure: OSVDB Verified

Technical

This BSD TCP/IP Reset vulnerability differs from some other reset vulnerabilities because of the flawed platform interpretation of sequence numbers, not a lack of acknowledgment number checking.

Solution

Currently, there are no known workarounds or upgrades to correct this issue. However, FreeBSD and OpenBSD released patches to address this vulnerability.

Products

FreeBSD Project	FreeBSD	2.2.0
		2.2.1
		2.2.2
		2.2.3
		2.2.4
		2.2.5
		2.2.6
		2.2.7
		2.2.7-RELEASE
		2.2.7-STABLE

OpenBSD	OpenBSD	2.0
		2.1
		2.2
		2.3
		2.4

References

CVE ID: 1999-0053 (see also: NVD)
ISS X-Force ID: 3377
Related OSVDB ID: 4030
Vendor Specific Advisory URL: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/old/FreeBSD-SA-98:07.rst.asc http://www.openbsd.org/errata24.html#rst
Vendor URL: http://www.freebsd.org
http://www.openbsd.org

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 5.0
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

Blogs

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