CVE-2003-0743

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.

7.5

CVSS

Severity: High

CVSS 2.0 •

EPSS 7.02% Top 10%

Vendor Advisory debian.org Vendor Advisory com.br

Affected: n/a n/a

References

Link	Tags
http://www.debian.org/security/2003/dsa-376	patch vendor advisory
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000735	vendor advisory
http://www.exim.org/pipermail/exim-users/Week-of-Mon-20030811/057720.html	mailing list
http://www.exim.org/pipermail/exim-announce/2003q3/000094.html
http://marc.info/?l=bugtraq&m=106252015820395&w=2	mailing list
http://marc.info/?l=vuln-dev&m=106264740820334&w=2	mailing list
http://www.exim.org/pipermail/exim-users/Week-of-Mon-20030811/057809.html	mailing list
http://packages.debian.org/changelogs/pool/main/e/exim/exim_3.36-13/changelog
http://packages.debian.org/changelogs/pool/main/e/exim4/exim4_4.34-10/changelog

Frequently Asked Questions

What is the severity of CVE-2003-0743?: CVE-2003-0743 has been scored as a high severity vulnerability.
How to fix CVE-2003-0743?: To fix CVE-2003-0743, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2003-0743 being actively exploited in the wild?: It is possible that CVE-2003-0743 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~7% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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