Is CVE-2015-7977 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2015-7977 being exploited in the wild.

How severe is CVE-2015-7977?

Medium severity, with a CVSS score of 5.9, published 30 January 2017.

Which products and versions are affected?

NTP Project Ntpd before 4.2.8p6, 4.3.x before 4.3.90.

Is there a fix for CVE-2015-7977?

A patch was published on 2016-01-19: NTP 4.2.8p6 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2015-7977 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2015-7977?

Check whether you run NTP Project Ntpd at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2015-7977: NTP Project ntpd denial of service via reslist command

CVE-2015-7977 · Severity: medium · CVSS 5.9 · Published 2017-01-30

A vulnerability in the Network Time Protocol daemon (ntpd) could allow a remote attacker to crash the service, causing a denial of service. This software is critical for synchronizing clocks across computer networks, and an outage can disrupt time-sensitive operations and security protocols. The issue is triggered by sending a specific command to the service.

Technologies: NTP Project Ntpd. Vendors: NTP Project.

Quick answers

Is CVE-2015-7977 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2015-7977 being exploited in the wild.
How severe is CVE-2015-7977?: Medium severity, with a CVSS score of 5.9, published 30 January 2017.
Which products and versions are affected?: NTP Project Ntpd before 4.2.8p6, 4.3.x before 4.3.90.
Is there a fix for CVE-2015-7977?: A patch was published on 2016-01-19: NTP 4.2.8p6 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2015-7977 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2015-7977?: Check whether you run NTP Project Ntpd at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A NULL pointer dereference vulnerability exists in the ntpd component of NTP. The flaw is triggered when the service processes a 'reslist' command via ntpdc. A remote, unauthenticated attacker can exploit this to cause the ntpd process to crash, resulting in a denial of service. The vulnerability is present in versions prior to 4.2.8p6 and 4.3.x versions prior to 4.3.90. Users are advised to upgrade to a patched version to mitigate this risk.

Affected products

NTP Project ntpd before 4.2.8p6, 4.3.x before 4.3.90

Timeline

2016-01-19: patched: NTP 4.2.8p6 released
2017-01-30: disclosed: NVD publication date

References

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