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CVE-2004-0309

34
FAUCET Score

CVE-2004-0309 describes a critical stack-based buffer overflow vulnerability in the SMTP service of Zone Labs ZoneAlarm and Integrity client products. This flaw allows unauthenticated remote attackers to execute arbitrary code on affected systems by sending a specially crafted, long RCPT TO argument. With a CVSS score of 10.0, this vulnerability is highly severe, requiring no authentication and having complete impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:zonelabs:integrity:4.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:zonelabs:zonealarm:4.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:zonelabs:zonealarm:4.0:*:plus:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:zonelabs:zonealarm:4.0:*:pro:*:*:*:*:*
4.5CPE matchmatch criteria
cpe:2.3:a:zonelabs:zonealarm:4.5:*:pro:*:*:*:*:*

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
8.84%
Probability of exploitation in next 30 days
EPSS Percentile
94.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0884 is in the 91st 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

download.zonelabs.com / bin/free/securityAlert/8.html
marc.info
exchange.xforce.ibmcloud.com / vulnerabilities/14991
ciac.org / ciac/bulletins/o-084.shtml
kb.cert.org / vuls/id/619982
Third Party AdvisoryUS Government Resource
osvdb.org / 3991
securityfocus.com / bid/9696
Vendor Advisory