CVE-1999-0159
https://notcve.org/view.php?id=CVE-1999-0159
Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login). This applies to some IOS 9.x, 10.x, and 11.x releases. • https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159 •
CVE-1999-0230
https://notcve.org/view.php?id=CVE-1999-0230
Buffer overflow in Cisco 7xx routers through the telnet service. • http://www.osvdb.org/1102 •
CVE-1999-0160
https://notcve.org/view.php?id=CVE-1999-0160
Some classic Cisco IOS devices have a vulnerability in the PPP CHAP authentication to establish unauthorized PPP connections. • http://www.osvdb.org/1099 •
CVE-1999-0161
https://notcve.org/view.php?id=CVE-1999-0161
In Cisco IOS 10.3, with the tacacs-ds or tacacs keyword, an extended IP access control list could bypass filtering. • http://www.osvdb.org/797 •
CVE-1999-1466
https://notcve.org/view.php?id=CVE-1999-1466
Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the "established" keyword. • http://www.cert.org/advisories/CA-1992-20.html http://www.securityfocus.com/bid/53 •