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CVE-2004-0657

17
FAUCET Score

CVE-2004-0657 describes an integer overflow vulnerability in the NTP daemon (NTPd) prior to version 4.0, affecting products like HP NTP and NTP Tru64_UNIX. This flaw causes NTP servers to return incorrect date/time offsets when clients request times more than 34 years from the server's current time. With a CVSS score of 5.0, this vulnerability is network-exploitable with low complexity, leading to a partial integrity impact (incorrect time synchronization). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.0CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
4.0fCPE matchmatch criteria
cpe:2.3:o:hp:tru64_unix:4.0f:patch_kit8:*:*:*:*:*:*
4.0gCPE matchmatch criteria
cpe:2.3:o:hp:tru64_unix:4.0g:patch_kit4:*:*:*:*:*:*
5.1bCPE matchmatch criteria
cpe:2.3:o:hp:tru64_unix:5.1b:patch_kit2:*:*:*:*:*:*
5.1bCPE matchmatch criteria
cpe:2.3:o:hp:tru64_unix:5.1b:patch_kit3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.85%
Probability of exploitation in next 30 days
EPSS Percentile
85.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0285 is in the 79th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2004-0657Moderate

ntp: wrong date/time offset return could lead to integer overflow

Jun 18, 2020

References

marc.info
Mailing ListThird Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/15406
Third Party AdvisoryVDB Entry
kb.cert.org / vuls/id/584606
PatchThird Party AdvisoryUS Government Resource