CVE-2009-1594: Armorlogic Profense Web Application Firewall before 2.2.22, and 2.4.x before 2.4.4, does not properly implemen

Q: How do I fix CVE-2009-1594?

profense web application firewall: upgrade to newer than 2.2.21. Exact commands for each OS are on this page.

Q: Is CVE-2009-1594 being exploited?

CVE-2009-1594 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2009-1594 affect?

CVE-2009-1594 affects profense web application firewall. Severity is high (CVSS 7.5). Armorlogic Profense Web Application Firewall before 2.2.22, and 2.4.x before 2.4.4, does not properly implement the "positive model," which allows remote attackers to bypass certain protection mechanisms via a %0A (encoded newline), as demo

This month

HIGH 7.5UPGRADE

CVE-2009-1594 is a high-severity flaw (CVSS 7.5) affecting profense web application firewall. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Armorlogic Profense Web Application Firewall before 2.2.22, and 2.4.x before 2.4.4, does not properly implement the "positive model," which allows remote attackers to bypass certain protection mechanisms via a %0A (encoded newline), as demonstrated by a %0A in a cross-site scripting (XSS) attack URL.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-264
Published	2009-05-21
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: armorlogic

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

Am I affected?

Timeline

2009-05-21 14:30 UTCPublished CVE record published
2026-06-16 23:07 UTCUpdated Record last modified

armorlogic profense web application firewall UPGRADE

Affected: <= 2.2.21 · 2.4

Fixed in: newer than 2.2.21

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy profense-web-application-firewall || rpm -q profense-web-application-firewall || profense-web-application-firewall --version

2. UPGRADE to newer than 2.2.21 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade profense-web-application-firewall

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade profense-web-application-firewall

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2009-1594?

profense web application firewall: upgrade to newer than 2.2.21. Exact commands for each OS are on this page.

Is CVE-2009-1594 being exploited?

CVE-2009-1594 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-2009-1594 affect?

CVE-2009-1594 affects profense web application firewall. Severity is high (CVSS 7.5). Armorlogic Profense Web Application Firewall before 2.2.22, and 2.4.x before 2.4.4, does not properly implement the "positive model," which allows remote attackers to bypass certain protection mechanisms via a %0A (encoded newline), as demo

How urgent is CVE-2009-1594?

Priority 45/100. High severity

Related CVEs

CVE-2009-1745 HIGH 10.0 UPGRADE Armorlogic Profense Web Application Firewall before 2.2.22, and 2.4.x before 2.4.4, has a default root passwor
CVE-2009-1593 MEDIUM 4.3 UPGRADE Armorlogic Profense Web Application Firewall before 2.2.22, and 2.4.x before 2.4.4, does not properly implemen
CVE-2009-0468 MEDIUM 6.8 DOWNGRADE Multiple cross-site request forgery (CSRF) vulnerabilities in ajax.html in Profense Web Application Firewall 2
CVE-2009-0467 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in proxy.html in Profense Web Application Firewall 2.6.2 and 2.6.3 al

References

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