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>> OpenBSD Security Update Fixes IPv6 Type 0 Route Header Denial of Service Issue

Title : OpenBSD Security Update Fixes IPv6 Type 0 Route Header Denial of Service Issue
VUPEN ID : VUPEN/ADV-2007-1503
CVE ID : CVE-2007-2242
Rated as : Moderate Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2007-04-24


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A vulnerability has been identified in OpenBSD, which could be exploited by remote attackers to cause a denial of service. This issue is caused by a design error within the IPv6 protocol when handling IPv6 type 0 route headers, which could be exploited by remote attackers to create a denial of service condition via specially crafted packets.

Affected Products

OpenBSD 4.0
OpenBSD 3.9

Solution

Apply patch for OpenBSD 4.0 :
ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.0/common/012_route6.patch

Apply patch for OpenBSD 3.9 :
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/common/022_route6.patch

References

http://www.vupen.com/english/advisories/2007/1503
http://openbsd.org/errata40.html#012_route6
http://openbsd.org/errata39.html#022_route6

Credits

Vulnerability reported by Philippe Biondi, Arnaud Ebalard and Jun-ichiro itojun Hagino.

ChangeLog

2007-04-24 : Initial release

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