CVE-2002-1064: Thomas Hauck Jana Server 2.x through 2.2.1, and 1.4.6 and earlier, generates different responses for valid and

Routine

MEDIUM 5.0DOWNGRADE

CVE-2002-1064 is a medium-severity flaw (CVSS 5.0) 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 2.x through 2.2.1, and 1.4.6 and earlier, generates different responses for valid and invalid usernames, which allows remote attackers to identify valid users on the server.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.3% (top 17%)
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-2002-1064?

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

Is CVE-2002-1064 being exploited?

CVE-2002-1064 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-2002-1064 affect?

CVE-2002-1064 affects jana web server. Severity is medium (CVSS 5.0). Thomas Hauck Jana Server 2.x through 2.2.1, and 1.4.6 and earlier, generates different responses for valid and invalid usernames, which allows remote attackers to identify valid users on the server.

How urgent is CVE-2002-1064?

Priority 38/100. No elevated risk signals yet.

Related CVEs

CVE-2002-1066 HIGH 7.5 DOWNGRADE Thomas Hauck Jana Server 1.4.6 and earlier allows remote attackers to cause a denial of service and possibly e
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-2002-1063 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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