How severe is CVE-2004-0623?

CVE-2004-0623 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2004-0623 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0623?

CVE-2004-0623 primarily affects Gnu Gnats. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0623?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2004-0623 published?

CVE-2004-0623 was published on 2004-12-06 and last updated on 2026-06-16.

CVE-2004-0623

CVE-2004-0623 is a critical-severity vulnerability in Gnu Gnats with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Gnu Gnats
Published: 2004-12-06
Last modified: 2026-06-16

Description

Format string vulnerability in misc.c in GNU GNATS 4.00 may allow remote attackers to execute arbitrary code via format string specifiers in a string that gets logged by syslog.

Frequently asked questions

What is CVE-2004-0623?: Format string vulnerability in misc.c in GNU GNATS 4.00 may allow remote attackers to execute arbitrary code via format string specifiers in a string that gets logged by syslog.
How severe is CVE-2004-0623?: CVE-2004-0623 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2004-0623 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0623?: CVE-2004-0623 primarily affects Gnu Gnats. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0623?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2004-0623 published?: CVE-2004-0623 was published on 2004-12-06 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:gnu:gnats:3.0_02:*:*:*:*:*:*:*
cpe:2.3:a:gnu:gnats:3.2:*:*:*:*:*:*:*
cpe:2.3:a:gnu:gnats:3.14b:*:*:*:*:*:*:*
cpe:2.3:a:gnu:gnats:3.113:*:*:*:*:*:*:*
cpe:2.3:a:gnu:gnats:3.113.1:*:*:*:*:*:*:*
cpe:2.3:a:gnu:gnats:3.113.1.6:*:*:*:*:*:*:*
cpe:2.3:a:gnu:gnats:4.0:*:*:*:*:*:*:*

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