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Cisco Catalyst Switch Non-Standard TCP Flag Combination DoS Vulnerability
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Secunia Advisory:
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SA9223
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Release Date:
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2003-07-09
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Popularity:
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11,924 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 CATOS 5.x
Cisco CATOS 6.x
Cisco CATOS 7.x
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Cisco has reported a vulnerability in CatOS for various Catalyst switches, which can be exploited by malicious people to cause a DoS (Denial of Service) on certain active services on a vulnerable device.
The vulnerability is caused due to an error in the handling of certain TCP packets. This can be exploited by making just eight (8) TCP connection attempts with a non-standard TCP flag combination to a listening service. After receiving the connection attempts, the service will stop responding to further connection attempts.
The vulnerability has been reported to affect the following Catalyst models:
- Catalyst 4000 Series including models 2948G and 2980G/2980G-A
- Catalyst 5000 Series including models 2901, 2902 and 2926
- Catalyst 6000
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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