CVE-2018-17205 (GCVE-0-2018-17205)

Vulnerability from cvelistv5 – Published: 2018-09-19 16:00 – Updated: 2024-08-05 10:47
VLAI?
Summary
An 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.
Severity ?
No CVSS data available.
CWE
  • n/a
Assigner
References
https://access.redhat.com/errata/RHSA-2019:0053 vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/3873-1/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:3500 vendor-advisoryx_refsource_REDHAT
https://github.com/openvswitch/ovs/commit/0befd1f… x_refsource_MISC
https://access.redhat.com/errata/RHSA-2019:0081 vendor-advisoryx_refsource_REDHAT
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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