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

Summaryinfo

A vulnerability, which was classified as critical, was found in Revive Adserver up to 4.2.0. This issue affects the function unserialize of the component XML-RPC Invocation Script Handler. Such manipulation as part of Parameter leads to deserialization. This vulnerability is uniquely identified as CVE-2019-5434. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

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 deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. 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 public exploit are known.

The exploit is available at exploit-db.com. 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 vulnerability is also documented in the vulnerability database at Exploit-DB (47739). The entry VDB-134401 is pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Advertising Software

Vendor

• Revive

Name

• Adserver

Version

• 4.0
• 4.1
• 4.2.0

License

• free

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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