CVE-2019-5434 Information

Description

An attacker could send a specifically crafted payload to the XML-RPC invocation script and trigger the unserialize() call on the \what\ parameter in the \openads.spc\ RPC method. Such vulnerability could be used to perform various types of attacks e.g. exploit serialize-related PHP vulnerabilities or PHP object injection. It is possible although unconfirmed that the vulnerability has been used by some attackers in order to gain access to some Revive Adserver instances and deliver malware through them to third party websites. This vulnerability was addressed in version 4.2.0.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html https://hackerone.com/reports/512076 https://hackerone.com/reports/542670 https://www.revive-adserver.com/security/revive-sa-2019-001/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8