CVE-2004-2571: Multiple buffer overflows in EnderUNIX isoqlog 2.1.1 allow remote attackers to execute arbitrary code via the

This month

HIGH 7.5DOWNGRADE

CVE-2004-2571 is a high-severity flaw (CVSS 7.5) affecting isoqlog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple buffer overflows in EnderUNIX isoqlog 2.1.1 allow remote attackers to execute arbitrary code via the (1) parseQmailFromBytesLine, (2) parseQmailToRemoteLine, (3) parseQmailToLocalLine, (4) parseSendmailFromBytesLine, (5) parseSendmailToLine, (6) parseEximFromBytesLine, and (7) parseEximToLine functions in Parser.c; allow local users to execute arbitrary code via the (8) lowercase and (9) check_syslog_date functions in Parser.c, and (10)

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.3% (top 12%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: enderunix

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:09 UTCUpdated Record last modified

enderunix isoqlog DOWNGRADE

Affected: 2.1.1 · 2.2_beta

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1.1 (Debian / Ubuntu)

apt-cache madison isoqlog sudo apt install isoqlog=<VERSION_BEFORE_2.1.1> sudo apt-mark hold isoqlog

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

dnf --showduplicates list isoqlog sudo dnf downgrade isoqlog-<VERSION_BEFORE_2.1.1> sudo dnf versionlock add isoqlog

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.

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-2004-2571?

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

Is CVE-2004-2571 being exploited?

CVE-2004-2571 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-2004-2571 affect?

CVE-2004-2571 affects isoqlog. Severity is high (CVSS 7.5). Multiple buffer overflows in EnderUNIX isoqlog 2.1.1 allow remote attackers to execute arbitrary code via the (1) parseQmailFromBytesLine, (2) parseQmailToRemoteLine, (3) parseQmailToLocalLine, (4) parseSendmailFromBytesLine, (5) parseSendm

How urgent is CVE-2004-2571?

Priority 48/100. High severity

References

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