Revive Adserver up to 4.2.0 XML-RPC Invocation Script unserialize Parameter deserialization

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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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8.1$0-$5k0.00

A vulnerability was found in Revive Adserver up to 4.2.0 (Advertising Software) and classified as critical. Affected by this issue is the function unserialize of the component XML-RPC Invocation Script Handler. The manipulation as part of a Parameter leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-502. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 04/23/2019. The weakness was disclosed 05/06/2019. This vulnerability is handled as CVE-2019-5434 since 01/04/2019. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a private exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/07/2020).

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 13 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entry 134401 is pretty similar.

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VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-502
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept
Reliability: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfoedit

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Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfoedit

01/04/2019 🔍
04/23/2019 +109 days 🔍
05/06/2019 +13 days 🔍
05/06/2019 +0 days 🔍
06/07/2020 +398 days 🔍

Sourcesinfoedit

Status: Not defined

CVE: CVE-2019-5434 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfoedit

Created: 05/06/2019 09:17 PM
Updated: 06/07/2020 09:33 AM
Changes: (1) vulnerability_discoverydate
Complete: 🔍

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