CVE-2004-1264: Buffer overflow in the simplify_path function in config.c for ChBg 1.5 allows remote attackers to execute arbi

This week

HIGH 10.0DOWNGRADE

CVE-2004-1264 is a high-severity flaw (CVSS 10.0) affecting chbg. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the simplify_path function in config.c for ChBg 1.5 allows remote attackers to execute arbitrary code via a crafted chbg scenario file.

Why this priority

Critical severity
EPSS top 5%: 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	9.1% (top 5%)
CISA exploited list	No
Published	2005-01-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: chbg

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

chbg chbg DOWNGRADE

Affected: 1.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.5 (Debian / Ubuntu)

apt-cache madison chbg sudo apt install chbg=<VERSION_BEFORE_1.5> sudo apt-mark hold chbg

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

dnf --showduplicates list chbg sudo dnf downgrade chbg-<VERSION_BEFORE_1.5> sudo dnf versionlock add chbg

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: ChBg 1.5 - Scenario File 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-2004-1264?

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

Is CVE-2004-1264 being exploited?

CVE-2004-1264 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-2004-1264 affect?

CVE-2004-1264 affects chbg. Severity is high (CVSS 10.0). Buffer overflow in the simplify_path function in config.c for ChBg 1.5 allows remote attackers to execute arbitrary code via a crafted chbg scenario file.

How urgent is CVE-2004-1264?

Priority 64/100. Critical severity; EPSS top 5%: very likely to be exploited; Public exploit reference

References

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