CVE-2015-4339

Gmedia Photo Gallery <= 1.6.4 - Open Proxy

2015-05-27 00:00

Strategic Overview

Status: Patched in 1.6.5
Affected Plugin: Gmedia Photo Gallery
Affected Version: < 1.6.5
CVSS: 5.8Medium
Weakness type: CWE-441 · Unintended Proxy or Intermediary ('Confused Deputy')
CVE: CVE-2015-4339

View all Gmedia Photo Gallery vulnerabilities

At a glance

CVE-2015-4339 is a medium-severity Unintended Proxy or Intermediary ('Confused Deputy') vulnerability in the Gmedia Photo Gallery WordPress plugin, affecting versions < 1.6.5. It carries a CVSS score of 5.8 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.6.5; sites on affected versions should update now. Disclosed May 2015, reported by Chad Seaman.

Vulnerability Overview

The Gmedia Photo Gallery plugin for WordPress is vulnerable to Open Proxy attacks in versions up to, and including, 1.6.4. This is due to inclusion of a script intended to load images from a url that doesn't end in an image file extension. This makes it possible for unauthenticated attackers to proxy through the server and perform anonymized attacks on other servers.

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 privileges on the target site, and no interaction from a victim user.

CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')

The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.

Remediation

Update to version 1.6.5, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: Gmedia Photo Gallery 1.6.5 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2015-4339 https://www.wordfence.com/threat-intel/vulnerabilities/id/408cd4a7-d850-40fb-9b46-9381815c1222 https://nvd.nist.gov/vuln/detail/CVE-2015-4339

Related records

Other vulnerabilities in Gmedia Photo Gallery

CVSS Vector

5.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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