5850 : Qmail RCPT TO Command Remote Overflow
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Info

Last Modified

6 months ago

Percent Complete

100%

Disclosure

Jun 12, 1997

Discovery

Unknown

Dates

Exploit

Unknown

Solution

Unknown

Description

qmail-smtpd contains a flaw that may allow a remote denial of service. The issue is triggered by sending an email with a large number of recipient addresses. Qmail will attempt to process such message, which will consume all memory on the server host, and will result in loss of availability for this computer.

Classification

Location: Remote/Network Access Required
Attack Type: Denial of Service, Input Manipulation
Impact: Loss of Availability
Exploit: Exploit Available
Disclosure: OSVDB Verified

Solution

Upgrade to version 1.03 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workaround: limit amount of memory available to the qmail-smtpd process.

Products

Daniel J. Bernstein
Watch-list
qmail
Watch-list
1.0.1

References

Credit

  • Wietse Venema - wietseBrand New Doo Doowzv.win.tue.nl -

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