OpenBSD ICMP6 Packet "mbuf" Memory Corruption Vulnerability - Advisories

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OpenBSD ICMP6 Packet "mbuf" Memory Corruption Vulnerability

Secunia Advisory:	SA24490
Release Date:	2007-03-12
Last Update:	2007-03-16

Critical:	Highly critical
Impact:	DoS System access
Where:	From remote
Solution Status:	Vendor Patch

OS:	OpenBSD 3.x OpenBSD 4.0


CVE reference:	CVE-2007-1365 (Secunia mirror)

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Description: A vulnerability has been reported in OpenBSD, which can be exploited by malicious people to compromise a vulnerable system. The vulnerability is caused due to a memory corruption within the "mbuf" handling of ICMP6 packets. This can be exploited to cause a kernel panic or execute arbitrary code with kernel privileges. Successful exploitation requires that an attacker can send fragmented ICMPv6 packets to a target local system. The vulnerability is reported in versions 3.1 through 4.0. Other versions may also be affected. Solution: Apply patches or filter IPv6 packets as a workaround. OpenBSD 3.9: ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/common/020_m_dup1.patch OpenBSD 4.0: ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.0/common/010_m_dup1.patch Provided and/or discovered by: Alfredo Ortega, Core Security Technologies Changelog: 2007-03-14: Updated advisory with new information from Core Security. Increased criticality. 2007-03-14: Added CVE reference. 2007-03-16: Added link to US-CERT. Original Advisory: OpenBSD: http://www.openbsd.org/errata40.html#m_dup1 Core Security: http://www.coresecurity.com/index.php...ontentMod&action=item&id=1703 Other References: US-CERT VU#986425: http://www.kb.cert.org/vuls/id/986425



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise. Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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