SNS: Possible user enumeration with NSRPC

Advisory ID CVE Number Date discovered Severity Advisory revision
STORM-2023-027 CVE-2023-41166 07/13/2023 medium v2

Vulnerability details

It may be possible to check if a user account exists on a SNS firewall.

Impacted products

ProductsSeverityDetail
Stormshield Network Security medium SNS is impacted

Revisions

Version Date Description
v1 08/21/2023 Initial release
v2 12/15/2023 Update and disclose


Stormshield Network Security

CVSS v3.1 Overall Score: 4.2      

Analysis

Impacted version

It’s possible to know if a specific user account exists on the SNS firewall by using remote access commands.
  • SNS 3.7.0 to 3.7.39
  • SNS 3.11.0 to 3.11.27
  • SN 4.3.0 to 4.3.22
  • SNS 4.6.0 to 4.6.9
  • SNS 4.7.0 to 4.7.1

Workaround solution

Solution

Block access to port 1300 from the OUT interface.

The following version will fix the issue :

  • SNS 4.3.23
  • SNS 4.6.10
  • SNS 4.7.2


Attack Vector Attack Complexity Privileges Required User Interaction Scope Confidentiality Impact Integrity Impact Availability impact
Network Low None None Unchanged Low None None
CVSS Base score: 5.3 CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
Exploit Code Maturity Remediation Level Report Confidence
Proof of concept code Workaround Confirmed
CVSS Temporal score: 4.9 CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:W/RC:C)
Confidentiality Requirement (CR) Integrity Requirement (IR) Availability Requirement (AR)
Low Low Low
CVSS Environmental score: 4.2 CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:W/RC:C/CR:L/IR:L/AR:L/MAV:X/MAC:X/MPR:X/MUI:X/MS:X/MC:X/MI:X/MA:X)