Bug 1908845 (CVE-2020-35498)

Summary: CVE-2020-35498 openvswitch: limitation in the OVS packet parsing in userspace leads to DoS
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aconole, apevec, askrabec, atragler, bmontgom, chrisw, ctrautma, dbecker, dblechte, dfediuck, dramseur, eedri, eparis, fhallal, fleitner, i.maximets, jburrell, jhsiao, jhunter, jjoyce, jminter, jokerman, jschluet, kmitts, lhh, lpeer, mburns, mgala, mgoldboi, michal.skrivanek, mjudeiki, nstielau, ovs-qe, ovs-team, psampaio, ralongi, rhos-maint, rkhan, sbonazzo, sclewis, security-response-team, sherold, slinaber, sponnaga, srevivo, tgraf, tredaelli, yturgema
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: openvswitch 2.5.12, openvswitch 2.6.10, openvswitch 2.7.13, openvswitch 2.8.11, openvswitch 2.9.9, openvswitch 2.10.7, openvswitch 2.11.6, openvswitch 2.12.3, openvswitch 2.13.3, openvswitch 2.14.2 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-02-11 16:10:02 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1910206, 1910207, 1909048, 1909049, 1909050, 1909051, 1909052, 1909053, 1909054, 1909056, 1909059, 1909060, 1909107, 1909193, 1909194, 1927492, 1927493, 1927591, 1927845    
Bug Blocks: 1903805    

Description Dhananjay Arunesh 2020-12-17 17:48:22 UTC
Due to a limitation in the OVS packet parsing in userspace, the resulting megaflow in the kernel is too wide which can potentially cause a DoS.

Comment 10 Anten Skrabec 2021-02-08 23:29:12 UTC
Acknowledgments:

Name: Joakim Hindersson <joakim.hindersson>

Comment 12 Anten Skrabec 2021-02-10 20:36:48 UTC
Created openvswitch tracking bugs for this issue:

Affects: fedora-all [bug 1927492]
Affects: openstack-rdo [bug 1927493]

Comment 13 Anten Skrabec 2021-02-10 21:01:33 UTC
External References:

https://www.openwall.com/lists/oss-security/2021/02/10/4

Comment 15 Anten Skrabec 2021-02-10 21:25:13 UTC
Statement:

Red Hat OpenStack Platform 13's openvswitch package will receive it's fixes from Fast Datapath.

Comment 17 errata-xmlrpc 2021-02-11 14:52:13 UTC
This issue has been addressed in the following products:

  Fast Datapath for Red Hat Enterprise Linux 8

Via RHSA-2021:0497 https://access.redhat.com/errata/RHSA-2021:0497

Comment 18 Product Security DevOps Team 2021-02-11 16:10:02 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-35498

Comment 19 errata-xmlrpc 2021-03-15 14:33:26 UTC
This issue has been addressed in the following products:

  Fast Datapath for Red Hat Enterprise Linux 8

Via RHSA-2021:0837 https://access.redhat.com/errata/RHSA-2021:0837

Comment 20 errata-xmlrpc 2021-03-15 14:35:07 UTC
This issue has been addressed in the following products:

  Fast Datapath for Red Hat Enterprise Linux 7

Via RHSA-2021:0834 https://access.redhat.com/errata/RHSA-2021:0834

Comment 21 errata-xmlrpc 2021-03-15 14:35:38 UTC
This issue has been addressed in the following products:

  Fast Datapath for Red Hat Enterprise Linux 7

Via RHSA-2021:0835 https://access.redhat.com/errata/RHSA-2021:0835

Comment 22 errata-xmlrpc 2021-03-31 12:57:00 UTC
This issue has been addressed in the following products:

  Red Hat Virtualization 4 for Red Hat Enterprise Linux 7

Via RHSA-2021:1050 https://access.redhat.com/errata/RHSA-2021:1050

Comment 23 errata-xmlrpc 2021-05-20 19:30:08 UTC
This issue has been addressed in the following products:

  Fast Datapath for Red Hat Enterprise Linux 7

Via RHSA-2021:2077 https://access.redhat.com/errata/RHSA-2021:2077

Comment 24 errata-xmlrpc 2021-06-16 10:57:34 UTC
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 13.0 (Queens)

Via RHSA-2021:2456 https://access.redhat.com/errata/RHSA-2021:2456