CVE-2019-5440: Weak RNG
First published: Tue May 28 2019(Updated: )
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.
Credit: support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Revive-adserver Revive Adserver | <4.2.1 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID of this issue is CVE-2019-5440.
What is the severity of CVE-2019-5440?
The severity of CVE-2019-5440 is high, with a severity value of 8.1.
Which version of Revive Adserver is affected by CVE-2019-5440?
Revive Adserver version up to exclusive 4.2.1 is affected by CVE-2019-5440.
What is the potential impact of CVE-2019-5440?
CVE-2019-5440 could allow an attacker to bypass authentication if they exploit the password recovery functionality.
Are there any references or additional resources for CVE-2019-5440?
Yes, you can find more information about CVE-2019-5440 at the following link: https://hackerone.com/reports/576504
- collector/nvd-index
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/last-modified-date
- agent/author
- agent/references
- agent/severity
- agent/event
- agent/type
- agent/tags
- agent/description
- agent/first-publish-date
- vendor/revive-adserver
- canonical/revive-adserver revive adserver