CVE-2021-3827 The default ECP binding flow can be bypassed, allowing other authentication flows.

CVE-2021-3827 The default ECP binding flow can be bypassed, allowing other authentication flows.

An attacker could use this flaw to bypass an MFA requirement, which could be dangerous if the user has an MFA requirement on the account. A more serious risk comes from the ease of exploiting this flaw. Since the default ECP binding is being bypassed, it is not necessary to have a high degree of knowledge or skill to exploit it. Thus, a threat of this flaw can be significant for any enterprise where MFA is a requirement for authentication. On a more personal level, an attacker can exploit this flaw to assume the identity of any enterprise user.

Move to Production as quick as possible

It is important to move to production as soon as possible because the attacker can exploit this flaw in minutes.

Vendor Response

The vendor of the affected software has released a patch to address this flaw.

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New Scenarios in MFA

An additional risk with MFA is that it can be bypassed with a default binding. As an example, if an attacker was able to gain access to the Enterprise Control Panel (ECP), they could use the default binding by using a user's email address and password to authenticate. This attack is dangerous because it does not require any special skills or knowledge on behalf of the attacker, which can make this threat significant for any enterprise where MFA is a requirement for authentication.

- If you have an account which requires MFA, you should change your password as soon as possible to avoid being exploited
- If you would like a more secure account, consider enhancing your account security by adding two-factor authentication

References

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