CVE-2015-4336

Backup, Restore and Migrate WordPress Sites With the XCloner Plugin <= 3.1.2 - Remote Command Execution

2015-05-10 00:00
Larry W. Cashdollar

Strategic Overview

Status
Patched in 3.1.3
Affected Plugin
Backup, Restore and Migrate your sites with XCloner
Affected Version
<= 3.1.2
CVSS
8.8High
Weakness type
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
CVE
CVE-2015-4336
View all Backup, Restore and Migrate your sites with XCloner vulnerabilities

At a glance

CVE-2015-4336 is a high-severity Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in the Backup, Restore and Migrate your sites with XCloner WordPress plugin, affecting versions <= 3.1.2. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). The issue is fixed in version 3.1.3; sites on affected versions should update now. Disclosed May 2015, reported by Larry W. Cashdollar.

Vulnerability Overview

cloner.functions.php in the XCloner plugin 3.1.2 for WordPress allows remote authenticated users to execute arbitrary commands via a file containing filenames with shell metacharacters, as demonstrated by using the backup comments feature to create the file.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Remediation

Update to version 3.1.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Backup, Restore and Migrate your sites with XCloner: 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: Backup, Restore and Migrate your sites with XCloner 3.1.3 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2015-4336https://www.wordfence.com/threat-intel/vulnerabilities/id/cd7c763f-5c2b-407e-bdb1-4ea34fac5f4dhttps://nvd.nist.gov/vuln/detail/CVE-2015-4336

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C