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NetBSD FAST_IPSEC "ipsec4_get_ulp()" Security Bypass
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Secunia Advisory:
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SA29180
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Release Date:
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2008-02-29
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Last Update:
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2008-03-19
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Critical:
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Moderately critical
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Impact:
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Security Bypass
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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: | NetBSD 3.1
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| | CVE reference: | CVE-2008-1335 (Secunia mirror)
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Description:
A security issue has been reported in NetBSD, which can potentially be exploited by malicious people to bypass certain security restrictions.
The security issue is caused due to the "ipsec4_get_ulp()" function assuming that the "ip_off" field of an IPSec packet is in host endian form. This can be exploited to bypass IPsec policies if at least one of two IPsec connected systems with different byte orders is running a NetBSD operating system.
Successful exploitation requires that the kernel is compiled with the "FAST_IPSEC" option.
Solution:
Patches have been committed to CVS for the affected NetBSD branches (see vendor advisory for further details).
Provided and/or discovered by:
The vendor credits Karl Knutsson.
Changelog:
2008-03-19: Added CVE reference.
Original Advisory:
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2008-002.txt.asc
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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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