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Date:
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Jul 02 2000 08:38:28 EDT
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From:
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Hugo Caye <[EMAIL PROTECTED]>
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Subject:
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[redewan] CISCO ROUTERS VULNERABLE TO SCANNERS |
"CISCO ROUTERS VULNERABLE TO SCANNERS
Cisco Systems is reminding customers that its hardware might crash
when certain vulnerability checks are performed against the devices.
If a scanner invokes a Telnet ENVIRON option 36 before the router is
ready to accept that instruction, the device might reset itself
unexpectedly. By repeatedly testing for the vulnerability, a malicious
user can launch a Denial of Service (DoS) attack against a device,
thereby blocking service to entire networks.
Although Cisco issued a bulletin on April 19, the defect is still
causing trouble for customers who haven't upgraded their router's
software. Cisco is urging users to upgrade as soon as possible.
<http://www.ntsecurity.net/go/2c.asp?f=/news.asp?IDF=154&TB=news>"
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