medium
6.5
CWE
254
Advisory Published
Updated

CVE-2015-7973

First published: Mon Jan 30 2017(Updated: )

NTP before 4.2.8p6 and 4.3.x before 4.3.90, when configured in broadcast mode, allows man-in-the-middle attackers to conduct replay attacks by sniffing the network.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Siemens TIM 4R-IE
Siemens TIM 4R-IE DNP3
NTP<4.2.8
NTP>=4.3.0<4.3.90
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
NTP=4.2.8-p4
NTP=4.2.8-p5
Siemens TIM 4R-IE DNP3
siemens SIMATIC TIM 4R-IE
Siemens TIM 4R-IE
Siemens TIM 4R-IE
FreeBSD Kernel>=10.0<10.1
FreeBSD Kernel=9.3
FreeBSD Kernel=9.3-p1
FreeBSD Kernel=9.3-p10
FreeBSD Kernel=9.3-p12
FreeBSD Kernel=9.3-p13
FreeBSD Kernel=9.3-p16
FreeBSD Kernel=9.3-p19
FreeBSD Kernel=9.3-p2
FreeBSD Kernel=9.3-p20
FreeBSD Kernel=9.3-p21
FreeBSD Kernel=9.3-p22
FreeBSD Kernel=9.3-p23
FreeBSD Kernel=9.3-p24
FreeBSD Kernel=9.3-p25
FreeBSD Kernel=9.3-p3
FreeBSD Kernel=9.3-p5
FreeBSD Kernel=9.3-p6
FreeBSD Kernel=9.3-p7
FreeBSD Kernel=9.3-p8
FreeBSD Kernel=9.3-p9
FreeBSD Kernel=10.1
FreeBSD Kernel=10.1-p1
FreeBSD Kernel=10.1-p10
FreeBSD Kernel=10.1-p12
FreeBSD Kernel=10.1-p15
FreeBSD Kernel=10.1-p16
FreeBSD Kernel=10.1-p17
FreeBSD Kernel=10.1-p18
FreeBSD Kernel=10.1-p19
FreeBSD Kernel=10.1-p2
FreeBSD Kernel=10.1-p22
FreeBSD Kernel=10.1-p24
FreeBSD Kernel=10.1-p25
FreeBSD Kernel=10.1-p26
FreeBSD Kernel=10.1-p27
FreeBSD Kernel=10.1-p3
FreeBSD Kernel=10.1-p4
FreeBSD Kernel=10.1-p5
FreeBSD Kernel=10.1-p6
FreeBSD Kernel=10.1-p7
FreeBSD Kernel=10.1-p8
FreeBSD Kernel=10.1-p9
FreeBSD Kernel=10.2
FreeBSD Kernel=10.2-p1
FreeBSD Kernel=10.2-p10
FreeBSD Kernel=10.2-p2
FreeBSD Kernel=10.2-p5
FreeBSD Kernel=10.2-p7
FreeBSD Kernel=10.2-p8
FreeBSD Kernel=10.2-p9
IBM Data ONTAP
NetApp OnCommand Balance
Ubuntu=12.04
Ubuntu=14.04
Ubuntu=16.04

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2015-7973?

    CVE-2015-7973 is classified as a moderate severity vulnerability due to its potential for man-in-the-middle attacks.

  • How do I fix CVE-2015-7973?

    To mitigate CVE-2015-7973, upgrade to NTP version 4.2.8p6 or later, or 4.3.90 or later.

  • What attacks are possible due to CVE-2015-7973?

    CVE-2015-7973 enables attackers to conduct replay attacks by sniffing network traffic in broadcast mode configurations.

  • Which systems are affected by CVE-2015-7973?

    CVE-2015-7973 affects NTP versions prior to 4.2.8p6 and 4.3.x versions prior to 4.3.90.

  • Is there a workaround for CVE-2015-7973?

    A viable workaround for CVE-2015-7973 is to disable broadcast mode in NTP configuration.

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