CVE-2003-0743 json
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…
published 2003-09-06 23 y ago modified 2026-06-16 4 mo ago also EUVD-2003-0734
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.7%
- EPSS 5.7% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- debian.org/security/2003/dsa-376 advisory
Exploit prediction
5.65% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
References
-
debian.org
/security/2003/dsa-376
vendor-advisory, patch
-
distro.conectiva.com.br
/atualizacoes/?id=a&anuncio=000735
vendor-advisory
-
exim.org
/pipermail/exim-users/Week-of-Mon-20030811/057720.html
mailing-list
- exim.org /pipermail/exim-announce/2003q3/000094.html
-
marc.info
/?l=bugtraq&m=106252015820395&w=2
mailing-list
-
marc.info
/?l=vuln-dev&m=106264740820334&w=2
mailing-list
-
exim.org
/pipermail/exim-users/Week-of-Mon-20030811/057809.html
mailing-list
- packages.debian.org /changelogs/pool/main/e/exim/exim_3.36-13/changelog
- packages.debian.org /changelogs/pool/main/e/exim4/exim4_4.34-10/changelog
Sources
- CVE List CVE-2003-0743
- NVD CVE-2003-0743
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