CVE-2006-2769: The HTTP Inspect preprocessor (http_inspect) in Snort 2.4.0 through 2.4.4 allows remote attackers to bypass "u

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MEDIUM 5.0DOWNGRADE

CVE-2006-2769 is a medium-severity flaw (CVSS 5.0) affecting snort. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The HTTP Inspect preprocessor (http_inspect) in Snort 2.4.0 through 2.4.4 allows remote attackers to bypass "uricontent" rules via a carriage return (\r) after the URL and before the HTTP declaration.

Why this priority

EPSS top 4%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	10.8% (top 4%)
CISA exploited list	No
Weakness	CWE-264
Published	2006-06-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: sourcefire

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-06-02 10:18 UTCPublished CVE record published
2026-06-16 22:25 UTCUpdated Record last modified

sourcefire snort DOWNGRADE

Affected: 2.4 · 2.4.1 · 2.4.2 · 2.4.3 · 2.4.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4

1. Check installed version

apt-cache policy snort || rpm -q snort || snort --version

2. No fixed release: DOWNGRADE to a release before 2.4 (Debian / Ubuntu)

apt-cache madison snort sudo apt install snort=<VERSION_BEFORE_2.4> sudo apt-mark hold snort

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list snort sudo dnf downgrade snort-<VERSION_BEFORE_2.4> sudo dnf versionlock add snort

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Snort 2.4.x - URIContent Rules Detection Evasion

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2006-2769?

snort: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-2769 being exploited?

CVE-2006-2769 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2006-2769 affect?

CVE-2006-2769 affects snort. Severity is medium (CVSS 5.0). The HTTP Inspect preprocessor (http_inspect) in Snort 2.4.0 through 2.4.4 allows remote attackers to bypass "uricontent" rules via a carriage return (\r) after the URL and before the HTTP declaration.

How urgent is CVE-2006-2769?

Priority 46/100. EPSS top 4%: very likely to be exploited; Public exploit reference

Software pages

Suricata and Snort vulnerabilities

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References

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