CVE-2019-5434

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.

Affected products

Vendor	Product	Affected	Fixed
—	Revive Adserver	Fixed version v4.2.0	—

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

Revive Adserver 4.2 - Remote Code Execution EDB-47739 · webapps · Dec 3, 2019

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Revive Adserver 4.2 - Remote Code Execution http/cves/2019/CVE-2019-5434.yaml

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

An attacker could send a specifically crafted payload to the XML-RPC invocation script and trigger the unserialize() call on the "what" par…