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Cisco Intrusion Detection / Prevention System "SSL Hello" Denial of Service
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Secunia Advisory:
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SA22046
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Release Date:
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2006-09-21
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Popularity:
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6,724 views
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| OS: | Cisco Intrusion Detection System (IDS) 4.x
Cisco Intrusion Prevention System (IPS) 5.x
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| CVE reference: | CVE-2006-4910
CVE-2006-4911
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Description:
A vulnerability has been reported in Cisco Intrusion Detection System and Cisco Intrusion Prevention System, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error within the processing of SSL v2 client Hello packets. This can be exploited to cause a DoS by sending a specially crafted Hello packet to a vulnerable system.
Successful exploitation can cause the mainApp process to fail, stopping a system from responding to remote management request sent to the web administration interface or the command-line interface via SSH, sending SMTP traps, and automatically updating ACLs (Access Control Lists) on remote firewall systems.
The vulnerability affects the following products:
- Cisco IDS 4.1(x) software prior to 4.1(5c)
- Cisco IPS 5.0(x) software prior to 5.0(6p1)
- Cisco IPS 5.1(x) software prior to 5.1(2)
Solution:
Apply updated software.
Cisco IDS 4.1(5b) and earlier:
Update to Cisco IDS 4.1(5c)
Cisco IPS 5.0(6p1) and earlier:
Update to Cisco IPS 5.0(6p2)
Cisco IPS 5.1(1) and earlier:
Update to Cisco IPS 5.1(2)
Provided and/or discovered by:
Reported by the vendor.
Changelog:
2006-09-21: Added CVE references.
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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