CVE-2016-1567

Publication date 26 January 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.”

From the Ubuntu Security Team

Matt Street discovered that chrony doesn’t verify peer associations of symmetric keys. A remote attacker could use this vulnerability impersonate another user.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
chrony	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Ignored end of life
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 2.1.1-1ubuntu0.1
	15.10 wily	Ignored end of life
	15.04 vivid	Ignored end of life
	14.04 LTS trusty	Fixed 1.29-1ubuntu0.1
	12.04 LTS precise	Ignored end of life

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
chrony	Upstream: ?id=a78

Severity score breakdown

Parameter	Value
Base score	8.1 · High
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H