CVE-2017-7905 Weak cryptography in GE Multilin SR, UR, and URplus Protective Relays
Attackers can recover user passwords via dictionary attacks due to weak encryption, enabling unauthorized access to GE protective relays.
- 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-2017-7905?
CVE-2017-7905 is a critical vulnerability in GE Multilin SR, UR, and URplus Protective Relays, published on 30 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Weak Cryptography for Passwords issue was discovered in General Electric (GE) Multilin SR 750 Feeder Protection Relay, firmware versions prior to Version 7.47; SR 760 Feeder Protection Relay, firmware versions prior to Version 7.47; SR 469 Motor Protection Relay, firmware versions prior to Version 5.23; SR 489 Generator Protection Relay, firmware versions prior to Version 4.06; SR 745 Transformer Protection Relay, firmware versions prior to Version 5.23; SR 369 Motor Protection Relay, all firmware versions; Multilin Universal Relay, firmware Version 6.0 and prior versions; and Multilin URplus (D90, C90, B95), all versions. Ciphertext versions of user passwords were created with a non-random initialization vector leaving them susceptible to dictionary attacks. Ciphertext of user passwords can be obtained from the front LCD panel of affected products and through issued Modbus commands.
Which versions are affected by CVE-2017-7905?
It affects 10 products.
Products include Ge Multilin Sr 369 Motor Protection Relay Firmware, Ge Multilin Sr 469 Motor Protection Relay Firmware, Ge Multilin Sr 489 Generator Protection Relay Firmware, Ge Multilin Sr 745 Transformer Protection Relay Firmware, Ge Multilin Sr 750 Feeder Protection Relay Firmware, Ge Multilin Sr 760 Feeder Protection Relay Firmware and 4 more.
How do I fix CVE-2017-7905?
No fix has been published for CVE-2017-7905 yet. Limit exposure of the affected software until one is available.
Is CVE-2017-7905 being exploited?
There is no known exploitation of CVE-2017-7905 in the wild and no public exploit code.
Sources
Also known as GHSA-j9fv-w27p-6g89.