CVE-2003-0743

HighCVSS 7.5/10Last modified Jun 16, 2026

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.

Metrics

CVSS 2.0 7.5/10AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected software

No affected versions have been published.

Timeline

Published
Oct 20, 2003
Last modified
Jun 16, 2026
NVD status
Modified

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CVE-2003-0743: High severity, CVSS 7.5 | Vulnix