How severe is CVE-2004-0657?

CVE-2004-0657 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2004-0657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0657?

CVE-2004-0657 primarily affects Ntp. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0657?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2004-0657 published?

CVE-2004-0657 was published on 2004-08-06 and last updated on 2026-06-16.

CVE-2004-0657

CVE-2004-0657 is a medium-severity vulnerability in Ntp with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Ntp
Published: 2004-08-06
Last modified: 2026-06-16

Description

Integer overflow in the NTP daemon (NTPd) before 4.0 causes the NTP server to return the wrong date/time offset when a client requests a date/time that is more than 34 years away from the server's time.

Frequently asked questions

What is CVE-2004-0657?: Integer overflow in the NTP daemon (NTPd) before 4.0 causes the NTP server to return the wrong date/time offset when a client requests a date/time that is more than 34 years away from the server's time.
How severe is CVE-2004-0657?: CVE-2004-0657 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2004-0657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0657?: CVE-2004-0657 primarily affects Ntp. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0657?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-0657 published?: CVE-2004-0657 was published on 2004-08-06 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:tru64_unix:4.0f:patch_kit8:*:*:*:*:*:*
cpe:2.3:o:hp:tru64_unix:4.0g:patch_kit4:*:*:*:*:*:*
cpe:2.3:o:hp:tru64_unix:5.1b:patch_kit2:*:*:*:*:*:*
cpe:2.3:o:hp:tru64_unix:5.1b:patch_kit3:*:*:*:*:*:*
cpe:2.3:o:hp:tru64_unix:5.1b:patch_kit4:*:*:*:*:*:*
cpe:2.3:o:hp:tru64_unix:51.1a:patch_kit6:*:*:*:*:*:*

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