CVE-2019-5440: 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…

PriorityP347high8.1CVSS 3.0

AVNACHPRNUINSUCHIHAH

EPSS

1.58%

72.4th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
revive-adserver	revive_adserver	< 4.2.1	4.2.1
revive	revive_adserver	—	—

CVSS provenance

nvdv3.08.1HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

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