CVE-2002-1066: Thomas Hauck Jana Server 1.4.6 and earlier allows remote attackers to cause a denial of service and possibly e

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HIGH 7.5DOWNGRADE

CVE-2002-1066 is a high-severity flaw (CVSS 7.5) affecting jana web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Thomas Hauck Jana Server 1.4.6 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code via a large message index value in a (1) RETR or (2) DELE command to the POP3 server, which exceeds the array limits and allows a buffer overflow attack.

Why this priority

High severity
EPSS top 9%: very likely to be exploited

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Published	2002-10-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: t. hauck

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

Am I affected?

Timeline

2002-10-04 04:00 UTCPublished CVE record published
2026-06-16 21:58 UTCUpdated Record last modified

t. hauck jana web server DOWNGRADE

Affected: 1.0 · 1.45 · 1.46 · 2.0 · 2.0_beta1 · 2.0_beta2 · 2.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy jana-web-server || rpm -q jana-web-server || jana-web-server --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison jana-web-server sudo apt install jana-web-server=<VERSION_BEFORE_1.0> sudo apt-mark hold jana-web-server

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

dnf --showduplicates list jana-web-server sudo dnf downgrade jana-web-server-<VERSION_BEFORE_1.0> sudo dnf versionlock add jana-web-server

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-2002-1066?

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

Is CVE-2002-1066 being exploited?

CVE-2002-1066 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-2002-1066 affect?

CVE-2002-1066 affects jana web server. Severity is high (CVSS 7.5). Thomas Hauck Jana Server 1.4.6 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code via a large message index value in a (1) RETR or (2) DELE command to the POP3 server, which exceeds the arra

How urgent is CVE-2002-1066?

Priority 49/100. High severity; EPSS top 9%: very likely to be exploited

Related CVEs

CVE-2002-1065 HIGH 7.5 DOWNGRADE Thomas Hauck Jana Server 2.x through 2.2.1, and 1.4.6 and earlier, does not restrict the number of unsuccessfu
CVE-2002-1064 MEDIUM 5.0 DOWNGRADE Thomas Hauck Jana Server 2.x through 2.2.1, and 1.4.6 and earlier, generates different responses for valid and
CVE-2002-1063 MEDIUM 5.0 DOWNGRADE Thomas Hauck Jana Server 2.x through 2.2.1, and 1.4.6 and earlier, allows remote attackers to cause a denial o
CVE-2002-1062 HIGH 7.5 DOWNGRADE Signedness error in Thomas Hauck Jana Server 2.x through 2.2.1, and 1.4.6 and earlier, allows remote attackers
CVE-2002-1061 HIGH 7.5 DOWNGRADE Multiple buffer overflows in Thomas Hauck Jana Server 2.x through 2.2.1, and 1.4.6 and earlier, allow remote a

References

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