CVE-2016-4825

Welcart e-Commerce < 1.8.3 - Object Injection

2016-06-24 00:00

Strategic Overview

Status: Patched in 1.8.3
Affected Plugin: Welcart e-Commerce
Affected Version: < 1.8.3
CVSS: 8.1High
Weakness type: CWE-502 · Deserialization of Untrusted Data
CVE: CVE-2016-4825

View all Welcart e-Commerce vulnerabilities

At a glance

CVE-2016-4825 is a high-severity Deserialization of Untrusted Data vulnerability in the Welcart e-Commerce WordPress plugin, affecting versions < 1.8.3. It carries a CVSS score of 8.1 (reachable over the network; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 1.8.3; sites on affected versions should update now. Disclosed June 2016, reported by Gen Sato.

Vulnerability Overview

The Collne Welcart e-Commerce plugin before 1.8.3 for WordPress allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via crafted serialized data.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-502: Deserialization of Untrusted Data

Reaching this weakness in Welcart e-Commerce < 1.8.3 takes a caller who can reach the endpoint. Deserialization of untrusted data means the application reconstructs objects from input a caller controls, letting the attacker choose which classes get instantiated and what their properties hold.

A workable chain turns deserialization into file writes, deletions or code execution, depending on what the loaded classes do in their magic methods. For Welcart e-Commerce the fix is 1.8.3: builds < 1.8.3 are affected, anything from 1.8.3 onward is not.

Remediation

Update to version 1.8.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Welcart e-Commerce: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Welcart e-Commerce 1.8.3 closes this, and updating the plugin is the step that ends it.

Firewall
Scanner
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2016-4825 https://www.wordfence.com/threat-intel/vulnerabilities/id/321d0121-5cc9-4736-89b0-228e45b48b48 https://nvd.nist.gov/vuln/detail/CVE-2016-4825

Related records

Same weakness class

Other vulnerabilities in Welcart e-Commerce

CVSS Vector

8.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Base

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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