Revive Adserver up to 4.2.0 Password Recovery PRNG weak prng

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$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 encryption vulnerability (PRNG). CWE is classifying the issue as CWE-338. 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.

Upgrading to version 4.2.1 eliminates this vulnerability.

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VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.5

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

NVD Base Score: 8.1
NVD Vector: 🔍

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

NVD Base Score: 🔍

Exploitinginfoedit

Name: PRNG
Class: Weak encryption / PRNG
CWE: CWE-338
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Economy: 🔍
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Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Adserver 4.2.1

Timelineinfoedit

01/04/2019 🔍
05/28/2019 +144 days 🔍
05/29/2019 +1 days 🔍
06/16/2020 +384 days 🔍

Sourcesinfoedit

Status: Not defined

CVE: CVE-2019-5440 (🔍)

Entryinfoedit

Created: 05/29/2019 08:21 AM
Updated: 06/16/2020 08:18 PM
Changes: (18) software_type vulnerability_cwe vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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