CVE-2003-1557

Off-by-one buffer overflow in spamc of SpamAssassin 2.40 through 2.43, when using BSMTP mode ("-B...

7.6 HighFix available

Off-by-one buffer overflow in spamc of SpamAssassin 2.40 through 2.43, when using BSMTP mode ("-B"), allows remote attackers to execute arbitrary code via email containing headers with leading "." characters.

Exploit likelihood

4.56%Down 3.0 points since Feb 4, 2022

What each source reports

NVD Score used 7.6

Record: CVE-2003-1557
CVSS 2.0: 7.6 HighAV:N/AC:H/Au:N/C:C/I:C/A:C
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

Record: CVE-2003-1557
Updated: 2026-11-02

EUVDEUVD-2003-1547 No score

Record: EUVD-2003-1547
Updated: 2026-11-03

GitHub AdvisoriesGHSA-q495-h2r3-cf69 No score

Off-by-one buffer overflow in spamc of SpamAssassin 2.40 through 2.43, when using BSMTP mode ("-B...

Record: GHSA-q495-h2r3-cf69
Weakness: CWE-119
Updated: 2026-11-02

OSV No score

Record: CVE-2003-1557
Updated: 2026-11-02

OSVDEBIAN-CVE-2003-1557 No score

Record: DEBIAN-CVE-2003-1557
Updated: 2026-11-02

Affected products

spamassassin

Affected packages

Affected packages
Package	Affected	Fixed
`spamassassin` Debian:12	before 3.1.7-2	3.1.7-2
`spamassassin` Debian:13	before 3.1.7-2	3.1.7-2
`spamassassin` Debian:14	before 3.1.7-2	3.1.7-2

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2003-1557 is a high vulnerability (CVSS 7.6) in Spamassassin, published December 31, 2003. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.56%, the 91st percentile. Fixed in spamassassin 3.1.7-2.