FrSIRT - FreeBSD Security Update Fixes Multiple TCP Vulnerabilities / Exploit (Security Advisories)

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FreeBSD Security Update Fixes Multiple TCP Vulnerabilities

Title : FreeBSD Security Update Fixes Multiple TCP Vulnerabilities
Advisory ID : FrSIRT/ADV-2005-0918
CVE ID : CVE-2005-0356 - CVE-2005-2068
Rated as : Moderate Risk

Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2005-06-30

Advisory Details

Description

Affected Products

Solution

References

Technical Description

FreeBSD has released a security patch to correct two vulnerabilities identified in the Transmission Control Protocol (TCP). The first flaw resides in the Transmission Control Protocol (TCP) Timestamps and Protection Against Wrapped Sequence Numbers (PAWS) techniques when handling specially crafted segments containing a large timestamp value, which could be exploited to cause a denial of service. The second issue occurs when a TCP packet with the SYN flag set is accepted for established connections, which could be exploited by an attacker to overwrite certain TCP options. For additional information, see : FrSIRT/ADV-2005-0567

ChangeLog

2005-06-30 : Initial release

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