OSSA-2019-001: Unsupported dport option prevents applying security groups

OSSA-2019-001: Unsupported dport option prevents applying security groups

Date

March 13, 2019

CVE

CVE-2019-9735

Affects

  • Neutron: <10.0.8, >=11.0.0 <11.0.7, >=12.0.0 <12.0.6, >=13.0.0 <13.0.3

Description

Erik Olof Gunnar Andersson with Blizzard Entertainment reported a vulnerability in Neutron’s iptables firewall module. By setting a destination port in a security group rule along with a protocol which doesn’t support that option (for example, VRRP), an authenticated user may block further application of security group rules for instances from any project/tenant on the compute hosts to which it’s applied. Only deployments using the iptables security group driver are affected.

Credits

  • Erik Olof Gunnar Andersson from Blizzard Entertainment (CVE-2019-9735)

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