CVE-2002-0599: Blahz-DNS 0.2 and earlier allows remote attackers to bypass authentication and modify configuration by directl

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HIGH 10.0DOWNGRADE

CVE-2002-0599 is a high-severity flaw (CVSS 10.0) affecting blahz-dns. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Blahz-DNS 0.2 and earlier allows remote attackers to bypass authentication and modify configuration by directly requesting CGI programs such as dostuff.php instead of going through the login screen.

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	11.5% (top 4%)
CISA exploited list	No
Published	2002-06-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: blahz-dns

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

Am I affected?

Timeline

2002-06-18 04:00 UTCPublished CVE record published
2026-06-16 21:57 UTCUpdated Record last modified

blahz-dns blahz-dns DOWNGRADE

Affected: 0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2

1. Check installed version

apt-cache policy blahz-dns || rpm -q blahz-dns || blahz-dns --version

2. No fixed release: DOWNGRADE to a release before 0.2 (Debian / Ubuntu)

apt-cache madison blahz-dns sudo apt install blahz-dns=<VERSION_BEFORE_0.2> sudo apt-mark hold blahz-dns

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

dnf --showduplicates list blahz-dns sudo dnf downgrade blahz-dns-<VERSION_BEFORE_0.2> sudo dnf versionlock add blahz-dns

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Blahz-DNS 0.2 - Direct Script Call Authentication Bypass

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-2002-0599?

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

Is CVE-2002-0599 being exploited?

CVE-2002-0599 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-2002-0599 affect?

CVE-2002-0599 affects blahz-dns. Severity is high (CVSS 10.0). Blahz-DNS 0.2 and earlier allows remote attackers to bypass authentication and modify configuration by directly requesting CGI programs such as dostuff.php instead of going through the login screen.

How urgent is CVE-2002-0599?

Priority 64/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

References

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