Assertion failure in Open vSwitch - CVE-2018-17205
Published: December 18, 2018
Vulnerability identifier: #VU16579
CSH Severity: Low
CVSS v4.0: 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-2018-17205
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: openvswitch.org
Affected software:
Open vSwitch
Open vSwitch
Detailed vulnerability description
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in ofproto_rule_insert__ in ofproto/ofproto.c due to flows that are added in a bundle are applied to ofproto in order during bundle commit. A remote attacker can trigger an an assertion failure due to a check on rule state != RULE_INITIALIZED while reinserting old flows and cause the service to crash.
How to mitigate CVE-2018-17205
Install update from vendor's website.