Title: Web Application Security Testing
Bug type = Server Security Misconfiguration > Misconfigure DNS > High Impact Subdomain Takeover
Priority= P2 (HIGH)
Description
Hi Justlend Team,
Recently, i just found some of your subdomain (*justlend.org) pointing to vulnerable Third Party site "Gitbook"
This issue is about your subdomain being misconfigured in Gitbook
https://docs-zh.justlend.org/
I verified the Cname record via MX Toolbox for DNS record check
I discovered that this subdomain “justlend.org” has an error with Gitbook meaning a non-connection with any project. Based on my past discoveries, this is a possible subdomain takeover
Impact
This vulnerability is rated as severe due to the increased impact that can be escalated to a high-severity threat and boils down to the registration of a domain by somebody else (with bad intentions) in order to gain control over one or more (sub)domains. This presents an interesting attack vector, which can even lead to several high-severity risks, like authentication bypass.
Risk Breakdown
- Risk: Severe
- Difficulty to Exploit: Easy
- Complexity: Easy
- Weakness Categories: Deployment Misconfiguration/Stored XSS/Authentication Bypass (CWE: 16)
- CVSS2 Score: 9.3 (AV:N/AC:M/Au:S/C:C/I:C/A:N)
Remediations
- Check your DNS-configuration for subdomains pointing to services not in use
- Set up your external service so it fully listens to your wildcard DNS.
- Our advice is to keep your DNS entries constantly vetted and restricted.
- Preventing subdomain takeovers is a matter of order of operations in lifecycle management for virtual hosts and DNS. Depending on the size of the organization, this may require communication and coordination across multiple departments, which can only increase the likelihood for a vulnerable misconfiguration.
- Create an inventory of all of your organization’s domains and their hosting providers, and update it as things change, to ensure that nothing is left dangling.
Thank you
Title: Web Application Security Testing
Bug type = Server Security Misconfiguration > Misconfigure DNS > High Impact Subdomain Takeover
Priority= P2 (HIGH)
Description
Hi Justlend Team,
Recently, i just found some of your subdomain (*justlend.org) pointing to vulnerable Third Party site "Gitbook"
This issue is about your subdomain being misconfigured in Gitbook
https://docs-zh.justlend.org/
I verified the Cname record via MX Toolbox for DNS record check
I discovered that this subdomain “justlend.org” has an error with Gitbook meaning a non-connection with any project. Based on my past discoveries, this is a possible subdomain takeover
Impact
This vulnerability is rated as severe due to the increased impact that can be escalated to a high-severity threat and boils down to the registration of a domain by somebody else (with bad intentions) in order to gain control over one or more (sub)domains. This presents an interesting attack vector, which can even lead to several high-severity risks, like authentication bypass.
Risk Breakdown
Remediations
Thank you