critical
9.8
CWE
119 120
Advisory Published
CVE Published
Updated

CVE-2015-7853: Buffer Overflow

First published: Thu Oct 22 2015(Updated: )

The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/ntp<4.2.8
4.2.8
NTP ntp>=4.2.0<4.2.8
NTP ntp>=4.3.0<4.3.77
NTP ntp=4.2.8
NTP ntp=4.2.8-p1
NTP ntp=4.2.8-p1-beta1
NTP ntp=4.2.8-p1-beta2
NTP ntp=4.2.8-p1-beta3
NTP ntp=4.2.8-p1-beta4
NTP ntp=4.2.8-p1-beta5
NTP ntp=4.2.8-p1-rc1
NTP ntp=4.2.8-p1-rc2
NTP ntp=4.2.8-p2
NTP ntp=4.2.8-p2-rc1
NTP ntp=4.2.8-p2-rc2
NTP ntp=4.2.8-p2-rc3
NTP ntp=4.2.8-p3
NTP ntp=4.2.8-p3-rc1
NTP ntp=4.2.8-p3-rc2
NTP ntp=4.2.8-p3-rc3
NetApp OnCommand Balance
NetApp OnCommand Performance Manager
NetApp OnCommand Unified Manager
NetApp Clustered Data ONTAP
NetApp Data ONTAP 7-Mode
Siemens Simatic Net CP 443-1 OPC UA Firmware

Remedy

http://support.ntp.org/bin/view/Main/NtpBug2920

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2015-7853?

    CVE-2015-7853 has a high severity as it allows remote attackers to execute arbitrary code or cause a denial of service by exploiting a negative input value.

  • How do I fix CVE-2015-7853?

    To fix CVE-2015-7853, upgrade NTP to version 4.2.8p4 or later, or 4.3.77 or later.

  • What versions are affected by CVE-2015-7853?

    CVE-2015-7853 affects NTP versions 4.2.x before 4.2.8p4 and 4.3.x before 4.3.77.

  • What is the nature of the vulnerability in CVE-2015-7853?

    CVE-2015-7853 is a potential buffer overflow vulnerability due to improper handling of the datalen parameter.

  • Can CVE-2015-7853 be exploited remotely?

    Yes, CVE-2015-7853 can be exploited by remote attackers through malicious input.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203