ngIRCd SSL/TLS denial of service

ngircd-ssltls-dos (54272) The risk level is classified as MediumMedium Risk

Description:

ngIRCd is vulnerable to a denial of service, caused by an error in the Conn_GetCipherInfo() and Conn_UsesSSL() functions when processing data. If the server is compiled with SSL/TLS support and standalone mode is disabled, a remote attacker could send a MOTD request to crash the server.

*CVSS:

Base Score: 5.4
  Access Vector: Network
  Access Complexity: High
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Complete
 
Temporal Score: 4
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of ngIRCd (14.1 or later), available from the ngIRCd Web site. See References.

References:

  • ngIRCd Web site : security: fix remotely triggerable crash in SSL/TLS code.
  • BID-37021: ngIRCd SSL/TLS Support MOTD Request Multiple Denial Of Service Vulnerabilities
  • CVE-2009-4652: The (1) Conn_GetCipherInfo and (2) Conn_UsesSSL functions in src/ngircd/conn.c in ngIRCd 13 and 14, when SSL/TLS support is present and standalone mode is disabled, allow remote attackers to cause a denial of service (application crash) by sending the MOTD command from another server in the same IRC network, possibly related to an array index error.
  • OSVDB ID: 59975: ngIRCd src/ngircd/conn.c Multiple Function SSL / TLS Remote DoS
  • SA37343: ngIRCd SSL/TLS Denial of Service Vulnerabilities

Platforms Affected:

  • Alexander Barton ngIRCd 13
  • Alexander Barton ngIRCd 14

Reported:

May 04, 2009

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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