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Cisco Intrusion Prevention System Fragmented IP Packets Security Bypass
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Secunia Advisory:
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SA22022
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Release Date:
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2006-09-21
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Popularity:
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6,453 views
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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: | Cisco Intrusion Prevention System (IPS) 5.x
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Description:
A vulnerability has been reported in Cisco Intrusion Prevention System, which can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due to insufficient inspection of fragmented IP packets. This can be exploited to bypass the Intrusion Prevention System to e.g. access internal systems by sending specially crafted IP packets.
The vulnerability affects the following products:
- Cisco IPS 5.0(x) software prior to 5.0(6p2)
- Cisco IPS 5.1(x) software prior to 5.1(2)
Solution:
Apply updated software.
Cisco IPS 5.0(6p1) and earlier:
Cisco IPS 5.0(6p2)
Cisco IPS 5.1(1) and earlier:
Cisco IPS 5.1(2)
Provided and/or discovered by:
Reported by the vendor.
Original Advisory:
http://www.cisco.com/warp/public/707/cisco-sa-20060920-ips.shtml
Other References:
US-CERT VU#658884:
http://www.kb.cert.org/vuls/id/658884
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About this Secunia Advisory
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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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