CVE-2015-1853

Description

chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, which allows remote attackers with knowledge of NTP peering to cause a denial of service (inability to synchronize) via random timestamps in crafted NTP data packets.

6.5

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.92% Top 30%

Vendor Advisory tuxfamily.org

Affected: chrony chrony

References

Link	Tags
https://security.gentoo.org/glsa/201507-01	third party advisory
http://chrony.tuxfamily.org/News.html	release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-1853?: CVE-2015-1853 has been scored as a medium severity vulnerability.
How to fix CVE-2015-1853?: To fix CVE-2015-1853, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-1853 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2015-1853 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2015-1853?: CVE-2015-1853 affects chrony chrony.

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