CVE-2004-0445

What it is

The SYMDNS.SYS driver in Symantec Norton Internet Security and Professional 2002 through 2004, Norton Personal Firewall 2002 through 2004, Norton AntiSpam 2004, Client Firewall 5.01 and 5.1.1, and Client Security 1.0 through 2.0 allows remote attackers to cause a denial of service (CPU consumption from infinite loop) via a DNS response with a compressed name pointer that points to itself.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

11.0% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2004-07-07 04:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 22:05 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 11.0% in the next 30 days (EPSS).
• Severity: 2.6 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2004-07-07 04:00 UTC

Last modified

2026-06-16 22:05 UTC

Exploit probability

11.0% · EPSS, next 30 days

Record status

Modified

Affected

• Symantec Client Firewall 5.01
• Symantec Client Firewall 5.1.1
• Symantec Client Security 1.0
• Symantec Client Security 1.1
• Symantec Client Security 1.2
• Symantec Client Security 1.3
• Symantec Client Security 1.4
• Symantec Client Security 1.5

Attack profile CVSS 2.0 · 2.6

Attack vector

Network

Complexity

High

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2004-0445.md and follow it. Check whether this project is affected by CVE-2004-0445. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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