Bug 1450997 (CVE-2017-7479)

Summary: CVE-2017-7479 openvpn: DoS due to exhaustion of packet-ID counter
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dazo, huzaifas, mauricio.teixeira, steve
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20170511,reported=20170424,source=upstream,cvss3=5.3/CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H,cwe=CWE-617,fedora-all/openvpn=affected,epel-all/openvpn=affected
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 03:12:40 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On: 1451000, 1451001    
Bug Blocks:    

Description Adam Mariš 2017-05-15 14:27:22 UTC
An authenticated client can cause the server's the packet-id counter to roll over, which would lead the server process to hit an ASSERT() and stop running.

Upstream fixes:

openvpn 2.3: https://github.com/OpenVPN/openvpn/commit/b727643cdf
openvpn 2.4: https://github.com/OpenVPN/openvpn/commit/591a4e574c
master: https://github.com/OpenVPN/openvpn/commit/e498cb0ea8

External References:

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

Comment 1 Adam Mariš 2017-05-15 14:27:38 UTC
Acknowledgments:

Name: the OpenVPN project
Upstream: QuarksLab

Comment 3 Adam Mariš 2017-05-15 14:32:16 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 03:12:40 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.