CVE-2009-4024: Argument injection vulnerability in the ping function in Ping.php in the Net_Ping package before 2.4.5 for PEA

Q: How do I fix CVE-2009-4024?

pear: upgrade to newer than 2.4.4. Exact commands for each OS are on this page.

Q: Is CVE-2009-4024 being exploited?

CVE-2009-4024 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-2009-4024 affect?

CVE-2009-4024 affects pear. Severity is high (CVSS 10.0). Argument injection vulnerability in the ping function in Ping.php in the Net_Ping package before 2.4.5 for PEAR allows remote attackers to execute arbitrary shell commands via the host parameter. NOTE: this has also been reported as a shel

Q: How urgent is CVE-2009-4024?

Priority 58/100. Critical severity; EPSS top 7%: very likely to be exploited

This month

HIGH 10.0UPGRADE

CVE-2009-4024 is a high-severity flaw (CVSS 10.0) affecting pear. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Argument injection vulnerability in the ping function in Ping.php in the Net_Ping package before 2.4.5 for PEAR allows remote attackers to execute arbitrary shell commands via the host parameter. NOTE: this has also been reported as a shell metacharacter problem.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	6.1% (top 7%)
CISA exploited list	No
Weakness	CWE-94
Published	2009-11-29
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: pear

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

Am I affected?

Timeline

2009-11-29 13:07 UTCPublished CVE record published
2026-06-16 23:12 UTCUpdated Record last modified

pear pear UPGRADE

Affected: <= 2.4.4 · 0.1 · 1.0 · 1.0.1 · 2.1 · 2.2 · 2.3 · 2.4

Fixed in: newer than 2.4.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.4.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pear

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pear

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-2009-4024?

pear: upgrade to newer than 2.4.4. Exact commands for each OS are on this page.

Is CVE-2009-4024 being exploited?

CVE-2009-4024 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-2009-4024 affect?

CVE-2009-4024 affects pear. Severity is high (CVSS 10.0). Argument injection vulnerability in the ping function in Ping.php in the Net_Ping package before 2.4.5 for PEAR allows remote attackers to execute arbitrary shell commands via the host parameter. NOTE: this has also been reported as a shel

How urgent is CVE-2009-4024?

Priority 58/100. Critical severity; EPSS top 7%: very likely to be exploited

Software pages

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References

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