CVE-2017-7479

Publication date 11 May 2017

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

OpenVPN versions before 2.3.15 and before 2.4.2 are vulnerable to reachable assertion when packet-ID counter rolls over resulting into Denial of Service of server by authenticated attacker.

From the Ubuntu Security Team

It was discovered that OpenVPN improperly triggered an assert when packet ids rolled over. An authenticated remote attacker could use this to cause a denial of service (application crash).

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openvpn	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Fixed 2.4.0-4ubuntu1.2
	16.10 yakkety	Fixed 2.3.11-1ubuntu2.1
	16.04 LTS xenial	Fixed 2.3.10-1ubuntu2.1
	14.04 LTS trusty	Fixed 2.3.2-7ubuntu3.2
	12.04 LTS precise	Ignored end of life

Notes

sbeattie

fix needs a87e1431baccd49a9344cfc63ab7446c4317fa2f (2.4) or 5d747770efa0611cc6cfeb6b3a5853bf51046d53 (2.3) as a prequisite

Patch details

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

Package	Patch details
openvpn	Upstream: b727643 Upstream: 591a4e5

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H