CVE-2003-0843: n/a vulnerability

CVE-2003-0843: Format string vulnerability in mod_gzip_printf for mod_gzip 1.3.26.1a and earlier, and possibly later offic...

Format string vulnerability in mod_gzip_printf for mod_gzip 1.3.26.1a and earlier, and possibly later official versions, when running in debug mode and using the Apache log, allows remote attackers to execute arbitrary code via format string characters in an HTTP GET request with an "Accept-Encoding: gzip" header.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 02:05 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2003-0843 is an old mod_gzip issue for Apache where a specially crafted web request could abuse debug logging and potentially run attacker-controlled code. Exposure appears limited to servers using affected mod_gzip versions with debug mode enabled and Apache logging configured. Likely exposure is legacy Apache deployments with mod_gzip 1.3.26.1a or earlier, possibly later official versions, where debug mode and Apache log output are enabled. Modern environments are less likely affected unless they retain old mod_gzip configurations. Prioritize investigation where old Apache systems are internet-facing. The business risk is potentially severe, but only under specific legacy configuration conditions. Confirm exposure before emergency action. Mitigation focus: Identify Apache hosts running mod_gzip and record exact module versions.; Disable mod_gzip debug mode where it is enabled.; Avoid Apache-log debug output for mod_gzip on exposed servers..

Prepared: Jun 30, 2026, 08:14 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 9, 2003, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

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n/an/an/aListed

Weakness

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