F5 BIG-IP Edge Client 7.1.5/7.1.6/7.1.7/7.1.8 VPN Authentication Request information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in F5 BIG-IP Edge Client 7.1.5/7.1.6/7.1.7/7.1.8. This affects an unknown part of the component VPN Handler. The manipulation as part of Authentication Request leads to information disclosure. This vulnerability is listed as CVE-2020-5893. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in F5 BIG-IP Edge Client 7.1.5/7.1.6/7.1.7/7.1.8 (Firewall Software). It has been rated as problematic. This issue affects an unknown functionality of the component VPN Handler. The manipulation as part of a Authentication Request leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

In versions 7.1.5-7.1.8, when a user connects to a VPN using BIG-IP Edge Client over an unsecure network, BIG-IP Edge Client responds to authentication requests over HTTP while sending probes for captive portal detection.

The weakness was presented 04/30/2020 (Website). The advisory is shared at support.f5.com. The identification of this vulnerability is CVE-2020-5893 since 01/06/2020. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/01/2020). MITRE ATT&CK project uses the attack technique T1592 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.7
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/06/2020 🔍
04/30/2020 +115 days 🔍
05/01/2020 +1 days 🔍
10/15/2020 +167 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: support.f5.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-5893 (🔍)
GCVE (CVE): GCVE-0-2020-5893
GCVE (VulDB): GCVE-100-154673

Entryinfo

Created: 05/01/2020 09:35
Updated: 10/15/2020 06:21
Changes: 05/01/2020 09:35 (39), 05/01/2020 09:40 (18), 10/15/2020 06:21 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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