CVE-2019-5440 Weak cryptography in Revive Adserver
Weak random number generation in password recovery tokens allows attackers to predict reset links and take over user accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-5440?
CVE-2019-5440 is a high-severity vulnerability in Revive-Adserver Revive Adserver, published on 28 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-338
Which versions are affected by CVE-2019-5440?
It affects 1 product.
Products include Revive-Adserver Revive Adserver.
How do I fix CVE-2019-5440?
No fix has been published for CVE-2019-5440 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-5440 being exploited?
There is no known exploitation of CVE-2019-5440 in the wild and no public exploit code.
Other vulnerabilities in Revive-Adserver Revive Adserver
- CVE-2016-9124 Security feature bypass in Revive Adserver All versions before 3.2.3
- CVE-2016-9125 Auth bypass in Revive Adserver All versions before 3.2.3
- CVE-2017-5830 Deserialization in n/a
- CVE-2016-9470 Other in Revive Adserver All versions before 3.2.5 and 4.0.0
- CVE-2026-50741 Code injection in Adserver
Sources
Also known as CVE-2019-12396, GHSA-38m3-mrrg-hx5g.