Revive Adserver up to 4.2.0 Password Recovery PRNG weak prng

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

A vulnerability, which was classified as critical, was found in Revive Adserver up to 4.2.0 (Advertising Software). This affects some unknown functionality of the component Password Recovery. The manipulation with an unknown input leads to a weak prng vulnerability (PRNG). CWE is classifying the issue as CWE-338. The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was shared 05/28/2019. This vulnerability is uniquely identified as CVE-2019-5440 since 01/04/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

Upgrading to version 4.2.1 eliminates this vulnerability.

The entries VDB-238190, VDB-238191, VDB-238192 and VDB-238193 are related to this item.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: PRNG
Class: Weak prng / PRNG
CWE: CWE-338 / CWE-331 / CWE-330
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Adserver 4.2.1

Timelineinfo

01/04/2019 🔍
05/28/2019 +144 days 🔍
05/29/2019 +1 days 🔍
09/24/2023 +1579 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Not defined

CVE: CVE-2019-5440 (🔍)
See also: 🔍

Entryinfo

Created: 05/29/2019 08:21 AM
Updated: 09/24/2023 03:34 PM
Changes: 05/29/2019 08:21 AM (38), 06/16/2020 08:18 PM (18), 09/24/2023 03:34 PM (4)
Complete: 🔍
Cache ID: 44:361:40

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