#VU16580 Buffer over-read in Open vSwitch - CVE-2018-17206

Vulnerability identifier: #VU16580

Vulnerability risk: Low

CVSSv4.0: 7.7 [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-2018-17206

CWE-ID: CWE-126

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Open vSwitch
Hardware solutions / Firmware

Vendor: openvswitch.org

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to buffer over-read issue during BUNDLE action decoding in the decode_bundle function inside lib/ofp-actions.c. A remote attacker can trigger memory corruption and cause the service to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Open vSwitch: 2.7.0 - 2.7.6

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External links
https://github.com/openvswitch/ovs/commit/9237a63c47bd314b807cda0bd2216264e82edbe8

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.