CVE-2005-3492: FlatFrag 0.3 and earlier allows remote attackers to cause a denial of service (crash) by sending an NT_CONN_OK

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MEDIUM 5.0DOWNGRADE

CVE-2005-3492 is a medium-severity flaw (CVSS 5.0) affecting flatfrag. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FlatFrag 0.3 and earlier allows remote attackers to cause a denial of service (crash) by sending an NT_CONN_OK command from a client that is not connected, which triggers a null dereference.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.5% (top 11%)
CISA exploited list	No
Published	2005-11-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: johannes f. kuhlmann

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

Am I affected?

Timeline

2005-11-04 00:02 UTCPublished CVE record published
2026-06-16 22:17 UTCUpdated Record last modified

johannes f. kuhlmann flatfrag DOWNGRADE

Affected: 0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3 (Debian / Ubuntu)

apt-cache madison flatfrag sudo apt install flatfrag=<VERSION_BEFORE_0.3> sudo apt-mark hold flatfrag

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

dnf --showduplicates list flatfrag sudo dnf downgrade flatfrag-<VERSION_BEFORE_0.3> sudo dnf versionlock add flatfrag

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: FlatFrag 0.3 - Buffer Overflow (Denial of Service) (PoC)

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-2005-3492?

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

Is CVE-2005-3492 being exploited?

CVE-2005-3492 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-2005-3492 affect?

CVE-2005-3492 affects flatfrag. Severity is medium (CVSS 5.0). FlatFrag 0.3 and earlier allows remote attackers to cause a denial of service (crash) by sending an NT_CONN_OK command from a client that is not connected, which triggers a null dereference.

How urgent is CVE-2005-3492?

Priority 45/100. Public exploit reference

Related CVEs

CVE-2005-3491 HIGH 7.5 DOWNGRADE Multiple buffer overflows in the receiver function in loop.c in FlatFrag 0.3 and earlier allow remote attacker

References

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