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OpenBSD ICMP6 Packet "mbuf" Memory Corruption Vulnerability
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Secunia Advisory:
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SA24490
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Release Date:
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2007-03-12
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Last Update:
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2007-03-16
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Popularity:
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9,073 views
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Critical:
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Highly critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| OS: | OpenBSD 3.x
OpenBSD 4.0
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| CVE reference: | CVE-2007-1365
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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
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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