CVE-2018-16994 Denial of service in n/a
Remote attackers can cause a complete lockup of Phoenix Contact and Bosch Rexroth fieldbus couplers by sending requests with non-standard symbols, requiring no authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-16994?
CVE-2018-16994 is a high-severity denial of service vulnerability in n/a, published on 18 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered on PHOENIX CONTACT AXL F BK PN <=1.0.4, AXL F BK ETH <= 1.12, and AXL F BK ETH XC <= 1.11 devices and Bosch Rexroth S20-ETH-BK and Rexroth S20-PN-BK+ (the S20-PN-BK+/S20-ETH-BK fieldbus couplers sold by Bosch Rexroth contain technology from Phoenix Contact). Incorrect handling of a request with non-standard symbols allows remote attackers to initiate a complete lock up of the bus coupler. Authentication of the request is not required.
Which versions are affected by CVE-2018-16994?
It affects 3 products.
Products include Phoenixcontact Axl F Bk Eth Firmware, Phoenixcontact Axl F Bk Eth Xc Firmware, Phoenixcontact Axl F Bk Pn Firmware.
How do I fix CVE-2018-16994?
No fix has been published for CVE-2018-16994 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-16994 being exploited?
There is no known exploitation of CVE-2018-16994 in the wild and no public exploit code.
Sources
Also known as GHSA-fjq9-2cmr-75cm.