Privilege escalation on the SSL VPN Client
| Advisory ID | CVE Number | Date discovered | Severity | Advisory revision |
|---|---|---|---|---|
| STORM-2021-004 | CVE-2021-27932 | 02/19/2021 | medium | v1 |
Vulnerability details
On an already-compromised Windows system, an attacker with limited rights can trigger an exploit, and get a privileges escalation on the system, using the SNS VPN Client.
Impacted products
| Products | Severity | Detail |
|---|---|---|
| SSL VPN Client | medium | SSL VPN Client is impacted |
Revisions
| Version | Date | Description |
|---|---|---|
| v1 | 07/05/2022 | Initial release |
SSL VPN Client |
CVSS v3.1 Overall Score: 5.3
|
Analysis |
Impacted version |
|
An attacker with limited-permissions can obtain the privileges from the service that runs the Stormshield SSL Client. |
|
Workaround solution |
Solution |
|
There is no workaround. |
The 3.1.0 update fixed this vulnerability. |
| Attack Vector | Attack Complexity | Privileges Required | User Interaction | Scope | Confidentiality Impact | Integrity Impact | Availability impact |
|---|---|---|---|---|---|---|---|
| Local | Low | Low | None | Unchanged | High | High | High |
| CVSS Base score: 7.8 | CVSS Vector: (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) |
| Exploit Code Maturity | Remediation Level | Report Confidence |
|---|---|---|
| Proof of concept code | Official fix | Confirmed |
| CVSS Temporal score: 7 | CVSS Vector: (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C) |
| Confidentiality Requirement (CR) | Integrity Requirement (IR) | Availability Requirement (AR) |
|---|---|---|
| High | High | High |
| CVSS Environmental score: 5.3 | CVSS Vector: (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C/CR:H/IR:H/AR:H/MAV:X/MAC:X/MPR:X/MUI:X/MS:X/MC:X/MI:X/MA:X) |
Acknowledgements
Stormshield is pleased to thank Daniel Kalinowski for reporting this issue under responsible disclosure through Stormshield private bugnounty program.