OpenVPN Access Server up to 2.8.3 User Authentication Token authentication bypass by assumed-immutable data
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.1 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, was found in OpenVPN Access Server up to 2.8.3 (Network Encryption Software). Affected is some unknown functionality of the component User Authentication Token Handler. The manipulation with an unknown input leads to a authentication bypass by assumed-immutable data vulnerability. CWE is classifying the issue as CWE-302. The authentication scheme or implementation uses key data elements that are assumed to be immutable, but can be controlled or modified by the attacker. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:
OpenVPN Access Server older than version 2.8.4 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp.
The weakness was shared 07/14/2020 (Website). The advisory is available at openvpn.net. This vulnerability is traded as CVE-2020-15074 since 06/25/2020. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.
Upgrading to version 2.8.4 eliminates this vulnerability.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.4VulDB Meta Temp Score: 7.2
VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Authentication bypass by assumed-immutable dataCWE: CWE-302
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Access Server 2.8.4
Timeline
06/25/2020 🔍07/14/2020 🔍
07/15/2020 🔍
10/30/2020 🔍
Sources
Advisory: openvpn.netStatus: Not defined
Confirmation: 🔍
CVE: CVE-2020-15074 (🔍)
Entry
Created: 07/15/2020 15:09Updated: 10/30/2020 13:41
Changes: 07/15/2020 15:09 (40), 07/15/2020 15:14 (18), 10/30/2020 13:41 (1)
Complete: 🔍
No comments yet. Languages: en.
Please log in to comment.