5.3
Medium
CVE-2021-27420 GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP…
Description
GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. By itself, this is not particularly significant as the relay remains effective in all other functionality and communication channels.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| UR family 8.1 | earliest → < 8.1x | 8.1x |
Other CVEs of UR family
The 6 CVEs of UR family →
CVE-2021-27422
GE UR firmware versions prior to version 8.1x web server interface is supported on UR over HTTP protocol
7.5
High
CVE-2021-27426
GE UR IED firmware versions prior to version 8.1x with “Basic” security variant does not allow the disabling of the…
9.8
Critical
CVE-2021-27424
GE UR firmware versions prior to version 8.1x shares MODBUS memory map as part of the communications guide
5.3
Medium
CVE-2021-27428
GE UR IED firmware versions prior to version 8.1x supports upgrading firmware using UR Setup configuration tool –…
9.8
Critical