Secunia Security Advisory - FreeBSD has issued an update for the TCP stack. This fixes a vulnerability, which can be exploited by malicious people to cause a DoS (Denial of Service) on active TCP sessions.
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TITLE:
FreeBSD TCP Stack Implementation Vulnerabilities
SECUNIA ADVISORY ID:
SA15867
VERIFY ADVISORY:
http://secunia.com/advisories/15867/
CRITICAL:
Less critical
IMPACT:
DoS
WHERE:
>From remote
OPERATING SYSTEM:
FreeBSD 5.x
http://secunia.com/product/1132/
FreeBSD 4.x
http://secunia.com/product/139/
DESCRIPTION:
FreeBSD has issued an update for the TCP stack. This fixes a
vulnerability, which can be exploited by malicious people to cause a
DoS (Denial of Service) on active TCP sessions.
For more information:
SA15393
Additionally, an error has also been fixed, which causes TCP SYN
packets to be accepted for established connections making it possible
to overwrite certain TCP options.
SOLUTION:
Update FreeBSD or apply patch.
Fixed versions:
2005-06-29 21:38:48 UTC (RELENG_5, 5.4-STABLE)
2005-06-29 21:41:03 UTC (RELENG_5_4, 5.4-RELEASE-p3)
2005-06-29 21:42:33 UTC (RELENG_5_3, 5.3-RELEASE-p17)
2005-06-29 21:43:42 UTC (RELENG_4, 4.11-STABLE)
2005-06-29 21:45:14 UTC (RELENG_4_11, 4.11-RELEASE-p11)
2005-06-29 21:46:15 UTC (RELENG_4_10, 4.10-RELEASE-p16)
Patch for FreeBSD 4.x:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:15/tcp4.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:15/tcp4.patch.asc
Patch for FreeBSD 5.x:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:15/tcp.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:15/tcp.patch.asc
ORIGINAL ADVISORY:
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:15.tcp.asc
OTHER REFERENCES:
SA15393:
http://secunia.com/advisories/15393/
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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.
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Please Note:
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clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
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