17677 : FreeBSD TCP Crafted SYN Packet Arbitrary Option Overwrite
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
3	306	over 6 years ago	over 3 years ago	0 times	90%

Timeline

Disclosure Date
2005-06-29

Description

FreeBSD contains a flaw that may allow a malicious user to modify certain TCP options via a TCP packet with the SYN flag set for an already established session. It is possible that the flaw may allow an attacker to spoof the remote IP and port numbers of an established connection and stall the TCP communications resulting in a loss of availability.

Classification

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

Solution

Upgrade to version 4-STABLE or 5-STABLE, or to the RELENG_5_4, RELENG_5_3, RELENG_4_11, or RELENG_4_10 security branch dated after 2005-06-29, as it has been reported to fix this vulnerability. In addition, FreeBSD has released patches for older FreeBSD 4.10, 4.11, 5.3, and 5.4 systems.

Products

FreeBSD Project	FreeBSD	4.10
		4.11
		5.3
		5.4

References

Security Tracker: 1014333
Secunia Advisory ID: 15867
CVE ID: 2005-2068 (see also: NVD)
Vendor Specific Advisory URL: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:15.tcp.asc
Vendor Specific News/Changelog Entry: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/tcp_input.c?rev=1.107.2.41.2.1&content-type=text/x-cvsweb-markup

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 5.0
Source: nvd.nist.gov | Generated: 2005-07-05 | Disagree?

Blogs

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

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