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
Published May 28, 2019
8.1
HIGHCVSS 3.0
EPSS 1.58%
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.
Affected products
-
- Version Fixed in 4.2.1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Revive | Revive Adserver | n/a |
|
- < 4.2.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.58% (0.01579) | 74.64th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.58% (0.01579) | 72.22th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.46% (0.00465) | 75.74th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.46% (0.00465) | 74.73th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.46% (0.00465) | 72.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.66% (0.00659) | 76.42th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 9.03% (0.09029) | 86.86th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.84% (0.01840) | 47.83th | v5 (v2026.06.15) |
| Jan 6, 2022 | 1.84% (0.01840) | 47.32th | v1 |
| Sep 1, 2021 | 0.42% (0.00416) | 25.53th | v1 |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (1)
- https://hackerone.com/reports/576504 x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://hackerone.com/reports/576504 | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.