CVE-2004-0551 Denial of service in n/a
Remote attackers can crash Cisco Catalyst switches by sending malformed TCP packets to Telnet, HTTP, or SSH services, causing a system reload.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2004-0551?
CVE-2004-0551 is a medium-severity denial of service vulnerability in n/a, published on 15 Jun 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cisco CatOS 5.x before 5.5(20) through 8.x before 8.2(2) and 8.3(2)GLX, as used in Catalyst switches, allows remote attackers to cause a denial of service (system crash and reload) by sending invalid packets instead of the final ACK portion of the three-way handshake to the (1) Telnet, (2) HTTP, or (3) SSH services, aka "TCP-ACK DoS attack."
Which versions are affected by CVE-2004-0551?
It affects 24 products.
Products include Cisco Catalyst 2901, Cisco Catalyst 2902, Cisco Catalyst 2926, Cisco Catalyst 2926f, Cisco Catalyst 2926gl, Cisco Catalyst 2926gs and 18 more.
How do I fix CVE-2004-0551?
No fix has been published for CVE-2004-0551 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2004-0551 being exploited?
There is no known exploitation of CVE-2004-0551 in the wild and no public exploit code.
Sources
Also known as GHSA-cq5p-fgmw-rvxv.