Bug 1450993 (CVE-2017-7478)

Summary: CVE-2017-7478 openvpn: Unauthenticated DoS via large control packets
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: dazo, huzaifas, mauricio.teixeira, steve
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: openvpn 2.3.15, openvpn 2.4.2 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-08 03:12:38 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1451000, 1451001    
Bug Blocks:    

Description Adam Mariš 2017-05-15 14:20:08 UTC
Asserting on the length of received control packets can lead to unauthenticated denial of service when received control packet is too large.

This issue affects OpenVPN 2.3.12 and newer.

Upstream fixes:

openvpn 2.3: https://github.com/OpenVPN/openvpn/commit/feb35ee5ca
openvpn 2.4: https://github.com/OpenVPN/openvpn/commit/66b99a0753
master: https://github.com/OpenVPN/openvpn/commit/5774cf4c25e

External References:

https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits

Comment 1 Adam Mariš 2017-05-15 14:20:23 UTC
Acknowledgments:

Name: the OpenVPN project
Upstream: QuarksLab

Comment 3 Adam Mariš 2017-05-15 14:32:03 UTC
Created openvpn tracking bugs for this issue:

Affects: epel-all [bug 1451001]
Affects: fedora-all [bug 1451000]

Comment 4 Product Security DevOps Team 2019-06-08 03:12:38 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.