What is CVE-2004-0748?

CVE-2004-0748 is a vulnerability in Apache HTTP Server, classified under Loop with Unreachable Exit Condition (Infinite Loop). Published 2004-10-20.

Is CVE-2004-0748 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Apache HTTP Server

CVE-2004-0748

mod_ssl in Apache 2.0.50 and earlier allows remote attackers to cause a denial of service (CPU consumption) by aborting an SSL connection in a way that causes an Apache child process to enter an infinite loop.

Published 2004-10-20 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.247 (97.8th percentile), scored 2026-10-01.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.247 · newest: 0.247 · change: 0.000

Affected products

Apache HTTP Server

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

Public proof-of-concept exploits

References

www.novell.com/linux/security/advisories/2004_30_apache2.html (vendor-advisory, Broken Link)
bugzilla.redhat.com/bugzilla/show_bug.cgi (Third Party Advisory, Issue Tracking)
www.trustix.org/errata/2004/0047/ (vendor-advisory, Broken Link)
www.mandrakesecure.net/en/advisories/advisory.php (vendor-advisory, Broken Link)
www.gentoo.org/security/en/glsa/glsa-200409-21.xml (vendor-advisory, Third Party Advisory)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:11126 (signature, Third Party Advisory, vdb-entry)
www.redhat.com/support/errata/RHSA-2004-349.html (vendor-advisory, Third Party Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/17200 (VDB Entry, Third Party Advisory, vdb-entry)
lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af… (mailing-list)
lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec23248… (mailing-list)

Frequently asked questions

What is CVE-2004-0748?: CVE-2004-0748 is a vulnerability in Apache HTTP Server, classified under Loop with Unreachable Exit Condition (Infinite Loop). Published 2004-10-20.
Is CVE-2004-0748 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.