Out-of-Bounds Affecting chrony package, versions <1.30-2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
2.61% (86th percentile)

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  • Snyk IDSNYK-DEBIAN14-CHRONY-11739540
  • published10 Aug 2025
  • disclosed16 Apr 2015

Introduced: 16 Apr 2015

CVE-2015-1821  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade Debian:14 chrony to version 1.30-2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream chrony package and not the chrony package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1