Msntauth Squid authentication module format string

msntauth-squid-format-string (9248) The risk level is classified as HighHigh Risk


Msntauth could allow a remote attacker to execute arbitrary code on an affected system, caused by a format string vulnerability in the code that processes the username and password. A remote attacker could pass arbitrary shell commands to a vulnerable server using a malformed username, which would be executed on the system with elevated privileges.


Gain Access


No remedy available as of September 1, 2014.


  • Stellar-x Software Web site: Stellar-X software downloads.
  • VulnWatch Mailing List, Mon Jun 03 2002 - 21:25:18 CDT: [DER #11] - Remotey exploitable fmt string bug in squid. (From Neohapsis archive)
  • BID-4929: Stellar-X MSNTAuth Syslog Format String Vulnerability
  • CVE-2002-0916: Format string vulnerability in the allowuser code for the Stellar-X msntauth authentication module, as distributed in Squid 2.4.STABLE6 and earlier, allows remote attackers to execute arbitrary code via format strings in the user name, which are not properly handled in a syslog call.
  • OSVDB ID: 5050: Squid Stellar-X Module msntauth User Name Format String

Platforms Affected:

  • Stellar-X Msntauth 2.0.3 and prior


Jun 04, 2002

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