CVE-2005-4300: Format string vulnerability in the lire_pop function in pop.c in libremail 1.1.0 and earlier, with compiled wi

Q: How do I fix CVE-2005-4300?

libremail: upgrade to newer than 1.1. Exact commands for each OS are on this page.

Q: Is CVE-2005-4300 being exploited?

CVE-2005-4300 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-2005-4300 affect?

CVE-2005-4300 affects libremail. Severity is high (CVSS 7.5). Format string vulnerability in the lire_pop function in pop.c in libremail 1.1.0 and earlier, with compiled with the debug option, allows remote attackers to execute arbitrary code via a crafted e-mail or POP server response.

This month

HIGH 7.5UPGRADE

CVE-2005-4300 is a high-severity flaw (CVSS 7.5) affecting libremail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Format string vulnerability in the lire_pop function in pop.c in libremail 1.1.0 and earlier, with compiled with the debug option, allows remote attackers to execute arbitrary code via a crafted e-mail or POP server response.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2005-12-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: libremail

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

Am I affected?

Timeline

2005-12-16 23:03 UTCPublished CVE record published
2026-06-16 22:18 UTCUpdated Record last modified

libremail libremail UPGRADE

Affected: <= 1.1

Fixed in: newer than 1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libremail

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-2005-4300?

libremail: upgrade to newer than 1.1. Exact commands for each OS are on this page.

Is CVE-2005-4300 being exploited?

CVE-2005-4300 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-2005-4300 affect?

CVE-2005-4300 affects libremail. Severity is high (CVSS 7.5). Format string vulnerability in the lire_pop function in pop.c in libremail 1.1.0 and earlier, with compiled with the debug option, allows remote attackers to execute arbitrary code via a crafted e-mail or POP server response.

How urgent is CVE-2005-4300?

Priority 47/100. High severity

References

← Back to latest CVEs