CVE-2017-7478

Publication date 11 May 2017

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.

From the Ubuntu Security Team

It was discovered that OpenVPN improperly triggered an assert when receiving an oversized control packet. A remote attacker could use this to cause a denial of service (server or client crash).

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openvpn	17.04 zesty	Fixed 2.4.0-4ubuntu1.2
	16.10 yakkety	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Not affected

Notes

sbeattie

introduced in 3c1b19e04745177185decd14da82c71458442b82 (2.4.0); also was backported to 2.3 in 358f513c008bf01fadb82759ac75ffb8613fc785 (2.3.12)

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3284-1
OpenVPN vulnerabilities
11 May 2017