CVE-2004-1303: Buffer overflow in the get function in get.c for Yanf 0.4 allows remote malicious web servers to execute arbit

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HIGH 10.0DOWNGRADE

CVE-2004-1303 is a high-severity flaw (CVSS 10.0) affecting yanf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the get function in get.c for Yanf 0.4 allows remote malicious web servers to execute arbitrary code via crafted HTTP responses.

Why this priority

Critical severity
EPSS top 6%: 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	6.2% (top 6%)
CISA exploited list	No
Published	2005-01-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: yanf

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

Am I affected?

Timeline

2005-01-10 05:00 UTCPublished CVE record published
2026-06-16 22:07 UTCUpdated Record last modified

yanf yanf DOWNGRADE

Affected: 0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.4 (Debian / Ubuntu)

apt-cache madison yanf sudo apt install yanf=<VERSION_BEFORE_0.4> sudo apt-mark hold yanf

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

dnf --showduplicates list yanf sudo dnf downgrade yanf-<VERSION_BEFORE_0.4> sudo dnf versionlock add yanf

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: Yanf 0.4 - HTTP Response Buffer Overflow

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-2004-1303?

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

Is CVE-2004-1303 being exploited?

CVE-2004-1303 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-2004-1303 affect?

CVE-2004-1303 affects yanf. Severity is high (CVSS 10.0). Buffer overflow in the get function in get.c for Yanf 0.4 allows remote malicious web servers to execute arbitrary code via crafted HTTP responses.

How urgent is CVE-2004-1303?

Priority 63/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference

References

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