CVE-2019-5440

Public Exploit

Description

Use of cryptographically weak PRNG in the password recovery token generation of Revive Adserver < v4.2.1 causes a potential authentication bypass attack if an attacker exploits the password recovery functionality. In lib/OA/Dal/PasswordRecovery.php, the function generateRecoveryId() generates a password reset token that relies on the PHP uniqid function and consequently depends only on the current server time, which is often visible in an HTTP Date header.

Category

8.1
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.39%
Third-Party Advisory hackerone.com
Affected: Revive Revive Adserver
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/576504 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2019-5440?
CVE-2019-5440 has been scored as a high severity vulnerability.
How to fix CVE-2019-5440?
To fix CVE-2019-5440, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-5440 being actively exploited in the wild?
It is possible that CVE-2019-5440 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-5440?
CVE-2019-5440 affects Revive Revive Adserver.
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