CVE-2009-2450: The OAmon.sys kernel driver 3.1.0.0 and earlier in Tall Emu Online Armor Personal Firewall AV+ before 3.5.0.12

Q: How do I fix CVE-2009-2450?

online armor personal firewall av\+: upgrade to newer than 3.5.0.11; personal firewall: upgrade to newer than 3.5.0.13. Exact commands for each OS are on this page.

Q: Is CVE-2009-2450 being exploited?

CVE-2009-2450 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-2009-2450 affect?

CVE-2009-2450 affects online armor personal firewall av\+, personal firewall. Severity is high (CVSS 7.2). The OAmon.sys kernel driver 3.1.0.0 and earlier in Tall Emu Online Armor Personal Firewall AV+ before 3.5.0.12, and Personal Firewall 3.5 before 3.5.0.14, allows local users to gain privileges via crafted METHOD_NEITHER IOCTL requests to \D

Q: How urgent is CVE-2009-2450?

Priority 44/100. High severity; Public exploit reference

This month

HIGH 7.2UPGRADEUPGRADE

CVE-2009-2450 is a high-severity flaw (CVSS 7.2) affecting online armor personal firewall av\+, personal firewall. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The OAmon.sys kernel driver 3.1.0.0 and earlier in Tall Emu Online Armor Personal Firewall AV+ before 3.5.0.12, and Personal Firewall 3.5 before 3.5.0.14, allows local users to gain privileges via crafted METHOD_NEITHER IOCTL requests to \Device\OAmon containing arbitrary kernel addresses, as demonstrated using the 0x830020C3 IOCTL.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-119
Published	2009-07-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: tallemu

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

Am I affected?

Timeline

2009-07-13 17:30 UTCPublished CVE record published
2026-06-16 23:09 UTCUpdated Record last modified

tallemu online armor personal firewall av\+ UPGRADE

Affected: <= 3.5.0.11 · 3.5.0.6 · 3.5.0.9

Fixed in: newer than 3.5.0.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy online-armor-personal-firewall-av+ || rpm -q online-armor-personal-firewall-av+ || online-armor-personal-firewall-av+ --version

2. UPGRADE to newer than 3.5.0.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade online-armor-personal-firewall-av+

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade online-armor-personal-firewall-av+

Note

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

tallemu personal firewall UPGRADE

Affected: <= 3.5.0.13 · 3.5.0.1 · 3.5.0.2 · 3.5.0.3 · 3.5.0.4 · 3.5.0.5 · 3.5.0.6 · 3.5.0.7

Fixed in: newer than 3.5.0.13

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy personal-firewall || rpm -q personal-firewall || personal-firewall --version

2. UPGRADE to newer than 3.5.0.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade personal-firewall

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade personal-firewall

Note

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

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: Online Armor < 3.5.0.12 - 'OAmon.sys' Local Privilege Escalation

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-2009-2450?

online armor personal firewall av\+: upgrade to newer than 3.5.0.11; personal firewall: upgrade to newer than 3.5.0.13. Exact commands for each OS are on this page.

Is CVE-2009-2450 being exploited?

CVE-2009-2450 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-2009-2450 affect?

CVE-2009-2450 affects online armor personal firewall av\+, personal firewall. Severity is high (CVSS 7.2). The OAmon.sys kernel driver 3.1.0.0 and earlier in Tall Emu Online Armor Personal Firewall AV+ before 3.5.0.12, and Personal Firewall 3.5 before 3.5.0.14, allows local users to gain privileges via crafted METHOD_NEITHER IOCTL requests to \D

How urgent is CVE-2009-2450?

Priority 44/100. High severity; Public exploit reference

References

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