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CVE-2017-7478

Publication date 11 May 2017

Last updated 24 July 2024

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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

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)

Other references