medium
5.9
CWE
20
Advisory Published
Updated

CVE-2015-7852: Input Validation

First published: Mon Aug 07 2017(Updated: )

ntpq in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (crash) via crafted mode 6 response packets.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
NTP>=4.2.0<4.2.8
NTP>=4.3.0<4.3.77
NTP=4.2.8
NTP=4.2.8-p1
NTP=4.2.8-p1-beta1
NTP=4.2.8-p1-beta2
NTP=4.2.8-p1-beta3
NTP=4.2.8-p1-beta4
NTP=4.2.8-p1-beta5
NTP=4.2.8-p1-rc1
NTP=4.2.8-p1-rc2
NTP=4.2.8-p2
NTP=4.2.8-p2-rc1
NTP=4.2.8-p2-rc2
NTP=4.2.8-p2-rc3
NTP=4.2.8-p3
NTP=4.2.8-p3-rc1
NTP=4.2.8-p3-rc2
NTP=4.2.8-p3-rc3
Debian Linux=7.0
Debian Linux=8.0
Debian Linux=9.0
NetApp OnCommand Balance
NetApp OnCommand Performance Manager
NetApp OnCommand Unified Manager
IBM Data ONTAP
IBM Data ONTAP
Oracle Linux=6
Red Hat Enterprise Linux Desktop=6.0
Red Hat Enterprise Linux Desktop=7.0
Red Hat Enterprise Linux Server=6.0
Red Hat Enterprise Linux Server=7.0
Red Hat Enterprise Linux Server=7.3
Red Hat Enterprise Linux Server=7.4
Red Hat Enterprise Linux Server=7.6
Red Hat Enterprise Linux Server=7.7
Red Hat Enterprise Linux Server=7.3
Red Hat Enterprise Linux Server=7.4
Red Hat Enterprise Linux Server=7.5
Red Hat Enterprise Linux Server=7.6
Red Hat Enterprise Linux Server=7.7
Red Hat Enterprise Linux Server=7.3
Red Hat Enterprise Linux Server=7.6
Red Hat Enterprise Linux Server=7.7
Red Hat Enterprise Linux Workstation=6.0
Red Hat Enterprise Linux Workstation=7.0

Remedy

http://support.ntp.org/bin/view/Main/NtpBug2919

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2015-7852?

    CVE-2015-7852 has a severity rating of medium due to its potential to cause a denial of service.

  • How do I fix CVE-2015-7852?

    To fix CVE-2015-7852, upgrade NTP to version 4.2.8p4 or 4.3.77 or later.

  • What systems are affected by CVE-2015-7852?

    CVE-2015-7852 affects NTP versions 4.2.8 prior to p4 and 4.3.x prior to 4.3.77.

  • Is CVE-2015-7852 exploitable remotely?

    Yes, CVE-2015-7852 can be exploited remotely via crafted mode 6 response packets.

  • What is the impact of CVE-2015-7852 on my system?

    The impact of CVE-2015-7852 is the potential crashing of the NTP daemon, leading to denial of service.

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Resources

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