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Cisco Catalyst 6500 / Cisco 7600 Series Devices Accessible Loopback Address Weakness
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Secunia Advisory:
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SA26988
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Release Date:
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2007-09-27
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Last Update:
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2007-10-01
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Popularity:
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6,143 views
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Critical:
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Not critical
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Impact:
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Security Bypass
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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 7600 Series 12.x
Cisco Catalyst 6500 Series 12.x
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Subscribe:
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| CVE reference: | CVE-2007-5134
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Description:
A weakness has been reported in Cisco Catalyst 6500 and Cisco 7600 series devices, which can be exploited by malicious people to bypass certain security restrictions.
The problem is that packets destined for the 127.0.0.0/8 network may be received and processed by e.g. the Supervisor module or Multilayer Switch Feature Card (MSFC). This can be exploited to e.g. bypass existing access control lists.
Successful exploitation requires that systems are running Hybrid Mode (Catalyst OS (CatOS) software on the Supervisor Engine and IOS Software on the MSFC) or Native Mode (IOS Software on both the Supervisor Engine and the MSFC).
The weakness is reported in all software versions on Cisco Catalyst 6500 and Cisco 7600 series prior to 12.2(33)SXH.
Solution:
Update to 12.2(33)SXH.
Provided and/or discovered by:
The vendor credits Lee E. Rian.
Changelog:
2007-10-01: Added CVE reference.
Original Advisory:
Cisco:
http://www.cisco.com/warp/public/707/cisco-sr-20070926-lb.shtml
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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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