Attacker Value
Very Low
(1 user assessed)
Exploitability
Very High
(1 user assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
2

CVE-2023-2991

Disclosure Date: June 22, 2023
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

Fortra Globalscape EFT’s administration server suffers from an information disclosure vulnerability where the serial number of the harddrive that Globalscape is installed on can be remotely determined via a “trial extension request” message

Add Assessment

1
Ratings
  • Attacker Value
    Very Low
  • Exploitability
    Very High
Technical Analysis

A special request to the Fortra Globalscape admin service returns what they call a TER – Trial Extension Request – which is a lightly-obfuscated Base64 string that contains the SHA256 sum of the harddrive’s serial number. The search space is small enough that it’s possible to reasonably bruteforce the hash, even on laptop hardware

CVSS V3 Severity and Metrics
Base Score:
5.3 Medium
Impact Score:
1.4
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
Low
Integrity (I):
None
Availability (A):
None

General Information

Vendors

  • globalscape

Products

  • eft server

Additional Info

Technical Analysis