What is CVE-2007-3847?

CVE-2007-3847 is a vulnerability in Apache HTTP Server, classified under Out-of-bounds Read. Published 2007-08-23.

Is CVE-2007-3847 known to be exploited?

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

Out-of-bounds Read in Apache HTTP Server

CVE-2007-3847

The date handling code in modules/proxy/proxy_util.c (mod_proxy) in Apache 2.3.0, when using a threaded MPM, allows remote origin servers to cause a denial of service (caching forward proxy process crash) via crafted date headers that trigger a buffer over-read.

Vulnerability class: Buffer Overflow

Published 2007-08-23 · 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: 0.129 (96.2th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.129 · newest: 0.129 · change: 0.000

Affected products

Apache HTTP Server
Canonical Ubuntu Linux — versions 6.06, 6.10, 7.04
Fedoraproject Fedora — versions 7
Fedoraproject Fedora Core — versions 6

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

References

secunia.com/advisories/28606 (Not Applicable, third-party-advisory)
www.redhat.com/support/errata/RHSA-2008-0005.html (vendor-advisory, Third Party Advisory)
www.vupen.com/english/advisories/2007/3955 (Permissions Required, vdb-entry)
secunia.com/advisories/28922 (Not Applicable, third-party-advisory)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:10525 (signature, Third Party Advisory, vdb-entry)
secunia.com/advisories/28749 (Not Applicable, third-party-advisory)
www-1.ibm.com/support/docview.wss (vendor-advisory, Third Party Advisory)
h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp (vendor-advisory, Broken Link)
secunia.com/advisories/26952 (Not Applicable, third-party-advisory)
secunia.com/advisories/26993 (Not Applicable, third-party-advisory)

Frequently asked questions

What is CVE-2007-3847?: CVE-2007-3847 is a vulnerability in Apache HTTP Server, classified under Out-of-bounds Read. Published 2007-08-23.
Is CVE-2007-3847 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.