CVE-2018-17205

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Summary

CVECVE-2018-17205
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-09-19 16:29:00 UTC
Updated2021-08-04 17:14:00 UTC
DescriptionAn issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting ofproto_rule_insert__ in ofproto/ofproto.c. During bundle commit, flows that are added in a bundle are applied to ofproto in order. If a flow cannot be added (e.g., the flow action is a go-to for a group id that does not exist), OvS tries to revert back all previous flows that were successfully applied from the same bundle. This is possible since OvS maintains list of old flows that were replaced by flows from the bundle. While reinserting old flows, OvS has an assertion failure due to a check on rule state != RULE_INITIALIZED. This would work for new flows, but for an old flow the rule state is RULE_REMOVED. The assertion failure causes an OvS crash.

Risk And Classification

Problem Types: CWE-617

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 18.04 All All All
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 18.04 All All All
Application Openvswitch Openvswitch All All All All
Application Redhat Openstack 10 All All All
Application Redhat Openstack 13 All All All
Application Redhat Openstack 13.0 All All All
Application Redhat Openstack 10 All All All
Application Redhat Openstack 13.0 All All All

References

ReferenceSourceLinkTags
Red Hat Customer Portal REDHAT access.redhat.com Third Party Advisory
Red Hat Customer Portal REDHAT access.redhat.com Third Party Advisory
Red Hat Customer Portal REDHAT access.redhat.com Third Party Advisory
ofproto: Fix OVS crash when reverting old flows in bundle commit · openvswitch/ovs@0befd1f · GitHub MISC github.com Exploit, Patch, Third Party Advisory
USN-3873-1: Open vSwitch vulnerabilities | Ubuntu security notices | Ubuntu UBUNTU usn.ubuntu.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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