IBM Tivoli Directory Server SSL/TLS denial of service

tds-cve20130556-dos (83009) The risk level is classified as MediumMedium Risk


A vulnerability in the Tivoli Directory Server can cause a connection to fail to time-out while waiting for incoming data from the client on a SSL/TLS connection. A successful attack could cause a delay or block access while trying to authenticate against applications and services that require this functionality. Non-SSL connections are not affected and only the Tivoli Directory Server server is impacted.


Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed


Denial of Service


Refer to IBM Security Bulletin 1631687 for patch, upgrade or suggested workaround information. See References.


  • IBM Security Bulletin 1631687: SSL/TLS denial of service vulnerability in IBM Tivoli Directory Server.
  • CVE-2013-0556: ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

Platforms Affected:

  • IBM Tivoli Directory Server 6.2
  • IBM Tivoli Directory Server 6.3


Mar 29, 2013

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