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CVE-2004-0646

29
FAUCET Score

CVE-2004-0646 describes a critical buffer overflow vulnerability in the WriteToLog function of JRun 3.0 through 4.0 web server connectors, including mod_jrun and mod_jrun20 for Apache, when verbose logging is enabled. This flaw allows remote attackers to execute arbitrary code by sending a specially crafted, long HTTP header Content-Type field or other fields. With a CVSS score of 10.0, this vulnerability is easily exploitable over the network with low attack complexity and no authentication required, leading to complete compromise of confidentiality, integrity, and availability. Despite its high severity and EPSS score, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:a:macromedia:coldfusion:6.0:*:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:a:macromedia:coldfusion:6.1:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:macromedia:jrun:3.0:*:*:*:*:*:*:*
3.1CPE matchmatch criteria
cpe:2.3:a:macromedia:jrun:3.1:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:macromedia:jrun:4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.10%
Probability of exploitation in next 30 days
EPSS Percentile
93.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0710 is in the 89th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/12647
exchange.xforce.ibmcloud.com / vulnerabilities/17485
kb.cert.org / vuls/id/990200
US Government Resource
macromedia.com / devnet/security/security_zone/mpsb04-08.html
Patch
macromedia.com / devnet/security/security_zone/mpsb04-09.html
securityfocus.com / archive/1/377194
securityfocus.com / bid/11245
PatchVendor Advisory