Courier MTA long year denial of service

courier-mta-year-dos (9228) The risk level is classified as MediumMedium Risk


Courier is vulnerable to a denial of service attack, caused by a mail message containing an unusually large year. A remote attacker could send a mail message containing an unusually large year to cause the recipient's mail client to enter into a loop that would result in 100% CPU usage.


Denial of Service


Upgrade to the latest version of Courier (0.38.2 or later), as listed in the Web site. See References.


Platforms Affected:

  • Double Precision Courier 0.38.1


May 31, 2002

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