#VU16578 Assertion failure in Open vSwitch - CVE-2018-17204
Published: December 16, 2018 / Updated: December 18, 2018
Vulnerability identifier: #VU16578
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2018-17204
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Open vSwitch
Open vSwitch
Software vendor:
openvswitch.org
openvswitch.org
Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in parse_group_prop_ntr_selection_method in lib/ofp-util.c due to validation of the group type and command after the whole group mod has been decoded. A remote attacker can trigger an an assertion failure via OVS_NOT_REACHED when the OF1.5 decoder tries to use the type and command earlier, when it might still be invalid.
Remediation
Install update from vendor's website.