What’s Vulnerable › Vulnerabilities

CVE-2016-1567

• Severity: high (CVSS 8.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2016-01-26 · updated 2026-06-17
• Weakness: CWE-254

Description

chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."

Affected products

• chrony: through 1.31.1; 2.0, 2.1, 2.1.1, 2.2

References

• http://chrony.tuxfamily.org/news.html#_20_jan_2016_chrony_2_2_1_and_chrony_1_31_2_released
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176559.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175969.html
• http://www.talosintel.com/reports/TALOS-2016-0071/
• http://chrony.tuxfamily.org/news.html#_20_jan_2016_chrony_2_2_1_and_chrony_1_31_2_released
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176559.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175969.html
• http://www.talosintel.com/reports/TALOS-2016-0071/

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