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CVE-2015-1821

6.5 · MEDIUM

Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of service (chronyd crash) or possibly execute arbitrary code by configuring the (1) NTP or (2…

Published Apr 16, 2015tuxfamilyCWE-119EPSS 3.41%

Overview

CVE-2015-1821 is a medium-severity vulnerability affecting tuxfamily chrony. It was published on April 16, 2015 and has a CVSS 2.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of service (chronyd crash) or possibly execute arbitrary code by configuring the (1) NTP or (2) cmdmon access with a subnet size that is indivisible by four and an address with a nonzero bit in the subnet remainder.

Remediation

Check the references section for vendor advisories and patches from tuxfamily. Update chrony to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
tuxfamilychrony0Affected

References

Reflistengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.htmlRefwww.debian.org/security/2015/dsa-3222Refwww.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.htmlRefwww.securityfocus.com/bid/73955Refsecurity.gentoo.org/glsa/201507-01Reflistengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.htmlRefwww.debian.org/security/2015/dsa-3222Refwww.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.htmlRefwww.securityfocus.com/bid/73955Refsecurity.gentoo.org/glsa/201507-01

How CyberStrike helps

Frequently asked questions

What is CVE-2015-1821?

CVE-2015-1821 is a medium-severity vulnerability affecting tuxfamily chrony. It was published on April 16, 2015 and has a CVSS 2.0 base score of 6.5 (MEDIUM).

How severe is CVE-2015-1821?

This vulnerability has a CVSS 2.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2015-1821?

Check the references section for vendor advisories and patches from tuxfamily. Update chrony to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-1821?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-1821 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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