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Multilin Sr 750 Feeder Protection Relay FirmwareOperating system · Ge

CVE-2017-7905

CRITICAL · 9.8 CVSS v3.0 Published 2017-06-30
Fix available
A fix is available. Upgrade to after 6.0 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Multilin Sr 750 Feeder Protection Relay FirmwareOperating system
Affected:<= 5.02
Multilin Sr 760 Feeder Protection Relay FirmwareOperating system
Affected:<= 5.02
Multilin Sr 469 Motor Protection Relay FirmwareOperating system
Affected:<= 2.90
Multilin Sr 489 Generator Protection Relay FirmwareOperating system
Affected:<= 1.53
Multilin Sr 745 Transformer Protection Relay FirmwareOperating system
Affected:<= 2.85
Multilin Sr 369 Motor Protection Relay FirmwareOperating system
Affected:all versions
Multilin Universal Relay FirmwareOperating system
Affected:<= 6.0
Multilin Urplus D90 FirmwareOperating system
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 6.0
Vendor patch ics-cert.us-cert.gov →
Recommended fix High confidence

Minimum fixed versions: SR 750/760 >= 7.47, SR 469/745 >= 5.23, SR 489 >= 4.06, Universal Relay > 6.0. Contact GE for SR 369 and URplus patch availability.

  1. 1. Identify the specific Multilin relay model(s) in your environment from the affected product list
  2. 2. Determine the current firmware version of each device through the front LCD panel or management interface
  3. 3. For SR 750 and SR 760: Upgrade firmware to Version 7.47 or later
  4. 4. For SR 469 and SR 745: Upgrade firmware to Version 5.23 or later
  5. 5. For SR 489: Upgrade firmware to Version 4.06 or later
  6. 6. For Multilin Universal Relay: Upgrade firmware to a version newer than 6.0
  7. 7. For SR 369 and URplus (D90, C90, B95): Contact GE directly for available security patches as no fixed version is specified in official documentation
  8. 8. After upgrade, verify that passwords cannot be extracted via Modbus or LCD panel access
Caveat Firmware upgrades on industrial control devices may require thorough testing in a non-production environment first; ensure you have a backup and rollback plan before applying updates to live protection relays.

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

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