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CVE-2018-17204

An 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.

Impact

An 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.

Affected products

VendorProductAffected versions
OpenvswitchOpenvswitch
from 2.7.0 through 2.7.6
RedhatOpenstack
Versions 10, 13
CanonicalUbuntu Linux
Versions 16.04, 18.04
DebianDebian Linux
Version 9.0

Weakness classification

CWE-617

References