DescriptionAn issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting parse_group_prop_ntr_selection_method in lib/ofp-util.c. When decoding a group mod, it validates the group type and command after the whole group mod has been decoded. The OF1.5 decoder, however, tries to use the type and command earlier, when it might still be invalid. This causes an assertion failure (via OVS_NOT_REACHED). ovs-vswitchd does not enable support for OpenFlow 1.5 by default.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openvswitch (PTS)stretch2.6.2~pre+git20161223-3vulnerable
stretch (security)2.6.10-0+deb9u1fixed
buster (security)2.10.7+ds1-0+deb10u1fixed
bullseye, sid2.15.0+ds1-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
openvswitchsourcejessie(not affected)


[jessie] - openvswitch <not-affected> (Vulnerable code does not exist; no such function) (master) (branch-2.8) (branch-2.7) (branch-2.6)
ovs-vswitchd does not enable support for OpenFlow 1.5 by default.

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