THREATPORT/VULNERABILITY/CVE-2003-0993
HIGH SEVERITY

CVE-2003-0993

Http Server vulnerability

CVSS
7.5
EPSS
9.7%
EPSS pct
95th
Exploited
No known
mod_access in Apache 1.3 before 1.3.30, when running big-endian 64-bit platforms, does not properly parse Allow/Deny rules using IP addresses without a netmask, which could allow remote attackers to bypass intended access restrictions.
Affected vendor
Apache
Affected product
Http Server
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Published
2004-03-29

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 9.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2003-0993

  • Confirm whether Apache Http Server is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2003-0993.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2003-0993

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2003-0993 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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