[UNIX] Unofficial Patch for Qmail Crash After Long SMTP Session
From: SecuriTeam (support_at_securiteam.com)
Date: 01/22/04
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To: list@securiteam.com Date: 22 Jan 2004 18:02:28 +0200
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Unofficial Patch for Qmail Crash After Long SMTP Session
------------------------------------------------------------------------
SUMMARY
As reported, Qmail suffers from a vulnerability which allows a remote user
to crash the qmail daemon. For more details see:
<http://www.securiteam.com/unixfocus/5QP0D2ABPQ.html> Qmail Crash and
Memory Overwrite After Long SMTP Session
Below is an unofficial patch which mitigates the problem.
DETAILS
--- qmail-smtpd.c Mon Jun 15 13:53:16 1998
+++ qmail-smtpd-patched.c Mon Jan 19 15:22:23 2004
@@ -316,8 +316,8 @@
if (flagmaybex) if (pos == 7) ++*hops;
if (pos < 2) if (ch != "\r\n"[pos]) flagmaybey = 0;
if (flagmaybey) if (pos == 1) flaginheader = 0;
+ ++pos;
}
- ++pos;
if (ch == '\n') { pos = 0; flagmaybex = flagmaybey = flagmaybez =
1; }
}
switch(state) {
ADDITIONAL INFORMATION
The information has been provided by <mailto:aanton@reversedhell.net>
Anton Alin-Adrian
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