908 : Multiple BSD TCP/IP Stacks IP Fragmentation Remote DoS
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
8	752	over 8 years ago	about 1 year ago	1 times	90%

Timeline

Disclosure Date	Exploit Publish Date
1998-11-04	1998-11-04

Description

Certain BSD derived TCP/IP stacks contain a flaw that may allow a remote denial of service. The issue is triggered when a malicious user creates and sends a pair of malformed IP packets that are reassembled into an invalid UDP datagram. The invalid UDP datagram will cause the kernel to panic and crash, resulting in a loss of availability for the platform.

Classification

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

Solution

Upgrade BSD to version 4.0 or higher, as it has been reported to fix this vulnerability. In addition, BSDI has released a patch for some older versions.

Upgrade FreeBSD to version 3.0 or higher after the correction date, as it has been reported to fix this vulnerability. In addition, FreeBSD has released a patch for some older versions.

Upgrade OpenBSD to version 2.4 or higher after the correction date, as it has been reported to fix this vulnerability. In addition, OpenBSD has released a patch for some older versions.

Products

FreeBSD Project	FreeBSD	1.x
		2.0.x
		2.1.x
		2.2.2
		2.2.8
		3.0-x

BSDI

BSD

3.1

OpenBSD	OpenBSD	2.2
		2.3
		2.4
		2.0
		2.1

References

Bugtraq ID: 120
ISS X-Force ID: 1389
CVE ID: 1999-0052 (see also: NVD)
Vendor Specific Solution URL: ftp://ftp.bsdi.com/bsdi/patches/patches-3.1 ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/CA-98-13/patch ftp://ftp.openbsd.org/pub/OpenBSD/patches/2.3/common/tcpfix.patch ftp://ftp.openbsd.org/pub/OpenBSD/patches/2.4/common/tcpfix.patch
Vendor Specific Advisory URL: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/old/FreeBSD-SA-98:08.fragment.asc
Vendor Specific News/Changelog Entry: http://www.openbsd.org/errata23.html#tcpfix
http://www.openbsd.org/errata24.html#tcpfix

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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