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published date: October 20, 2003

CVE-2003-0743 : Heap-based Buffer Overflow Vulnerability

Description

Heap-based buffer overflow in smtp_in.c for Exim 3 (exim3) before 3.36 and Exim 4 (exim4) before 4.21 may allow remote attackers to execute arbitrary code via an invalid (1) HELO or (2) EHLO argument with a large number of spaces followed by a NULL character and a newline, which is not properly trimmed before the "(no argument given)" string is appended to the buffer.

Product(s):

  • University of Cambridge Exim 3.0
  • University of Cambridge Exim 3.11
  • University of Cambridge Exim 3.12
  • University of Cambridge Exim 3.13
  • University of Cambridge Exim 3.14
  • University of Cambridge Exim 3.15

Question to Ask Vendors:

  1. Can you confirm whether your systems are affected by CVE-2003-0743, and if so, what steps are you currently taking to mitigate this vulnerability?
  2. What is your estimated timeline for fully resolving CVE-2003-0743 in your products or services, and how will you communicate updates on this issue to us as your customer?

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