Cisco ATA-186 Web interface authentication bypass

cisco-ata-bypass-auth (9057) The risk level is classified as MediumMedium Risk


If a remote attacker using the Cisco ATA-186 Web interface submits several specially-crafted change password requests, the attacker could bypass authentication and gain unauthorized administrative access to the device. An attacker could use this vulnerability to change the device's configuration.


Bypass Security


Upgrade to the appropriate fixed software version, as listed in Cisco Security Advisory: ATA-186 Password Disclosure Vulnerability. See References.


  • BugTraq Mailing List, Thu May 09 2002 - 12:30:11 CDT: Cisco ATA-186 admin password can be trivially circumvented.
  • Cisco Systems Inc. Security Advisory, 2004 March 29 01:00 GMT: ATA-186 Password Disclosure Vulnerability.
  • BID-4711: Cisco ATA-186 HTTP Device Configuration Disclosure Vulnerability
  • BID-4712: Cisco ATA-186 Web Administration Authentication Bypass Vulnerability
  • CVE-2002-0769: The web-based configuration interface for the Cisco ATA 186 Analog Telephone Adaptor allows remote attackers to bypass authentication via an HTTP POST request with a single byte, which allows the attackers to (1) obtain the password from the login screen, or (2) reconfigure the adaptor by modifying certain request parameters.

Platforms Affected:

  • Cisco ATA-186


May 09, 2002

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