high
7.5
CWE
772
Advisory Published
CVE Published
Updated

CVE-2015-7701

First published: Thu Oct 22 2015(Updated: )

A memory leak flaw was found in ntpd's CRYPTO_ASSOC. If ntpd is configured to use autokey authentication, an attacker could send packets to ntpd that would, after several days of ongoing attack, cause it to run out of memory. Mitigation: Disable NTP autokey authentication by removing, or commenting out, all configuration directives beginning with the 'crypto' keyword in your ntp.conf file. External References: <a href="https://github.com/ntp-project/ntp/blob/stable/NEWS#L91">https://github.com/ntp-project/ntp/blob/stable/NEWS#L91</a> <a href="http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner">http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner</a>

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
Oracle Linux=6
Debian GNU/Linux=7.0
Debian GNU/Linux=8.0
Debian GNU/Linux=9.0
NetApp OnCommand Performance Manager
NetApp OnCommand Unified Manager
NetApp Clustered Data ONTAP
NetApp Data ONTAP 7-Mode
redhat enterprise Linux desktop=6.0
redhat enterprise Linux desktop=7.0
redhat enterprise Linux server=6.0
redhat enterprise Linux server=7.0
redhat enterprise Linux server aus=7.3
redhat enterprise Linux server aus=7.4
redhat enterprise Linux server aus=7.6
redhat enterprise Linux server aus=7.7
redhat enterprise Linux server eus=7.3
redhat enterprise Linux server eus=7.4
redhat enterprise Linux server eus=7.5
redhat enterprise Linux server eus=7.6
redhat enterprise Linux server eus=7.7
redhat enterprise Linux server tus=7.3
redhat enterprise Linux server tus=7.6
redhat enterprise Linux server tus=7.7
redhat enterprise Linux workstation=6.0
redhat enterprise Linux workstation=7.0

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2015-7701?

    CVE-2015-7701 is considered a moderate severity vulnerability due to the potential for a memory leak that can lead to exhaustion of resources.

  • How do I fix CVE-2015-7701?

    To fix CVE-2015-7701, disable NTP autokey authentication by either removing or commenting out the relevant configuration.

  • What software is affected by CVE-2015-7701?

    CVE-2015-7701 affects NTP versions prior to 4.2.8 and versions between 4.3.0 and 4.3.77.

  • Can CVE-2015-7701 be exploited remotely?

    Yes, CVE-2015-7701 can be exploited remotely if the NTP daemon is configured to use autokey authentication.

  • What impact does CVE-2015-7701 have on systems?

    The impact of CVE-2015-7701 can lead to service downtime as it may cause the NTP daemon to run out of memory after prolonged attacks.

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