CVE-2003-1557

CVE-2003-1557 is a high-severity vulnerability in Spamassassin with a CVSS 2.0 base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Description

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.

Frequently asked questions

What is CVE-2003-1557?
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.
How severe is CVE-2003-1557?
CVE-2003-1557 has a CVSS 2.0 base score of 7.6, rated high severity.
Is CVE-2003-1557 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1557?
CVE-2003-1557 primarily affects Spamassassin. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-1557?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2003-1557 published?
CVE-2003-1557 was published on 2003-12-31 and last updated on 2026-06-16.

References

Affected products (4)

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