ATutor up to 2.2.1 ZIP File install_modules.php cross-site request forgery

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in ATutor up to 2.2.1. Impacted is an unknown function of the file install_modules.php of the component ZIP File Handler. Such manipulation leads to cross-site request forgery. This vulnerability is documented as CVE-2016-2539. The attack can be executed remotely. Additionally, an exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in ATutor up to 2.2.1 (Learning Management Software). It has been rated as problematic. Affected by this issue is an unknown part of the file install_modules.php of the component ZIP File Handler. The manipulation with an unknown input 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. CVE summarizes:

Cross-site request forgery (CSRF) vulnerability in install_modules.php in ATutor before 2.2.2 allows remote attackers to hijack the authentication of users for requests that upload arbitrary files and execute arbitrary PHP code via vectors involving a crafted zip file.

The bug was discovered 03/07/2016. The weakness was released 02/07/2017 by mr_me as EDB-ID 39524 as confirmed exploit (Exploit-DB). The advisory is shared for download at exploit-db.com. This vulnerability is handled as CVE-2016-2539 since 02/23/2016. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details as well as a public exploit are known.

A public exploit has been developed by mr_me and been published before and not just after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 337 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:install_modules.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.2.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (39524). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: mr_me
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ATutor 2.2.2
Patch: github.com

Timelineinfo

02/23/2016 🔍
03/07/2016 +13 days 🔍
03/07/2016 +0 days 🔍
03/07/2016 +0 days 🔍
02/07/2017 +337 days 🔍
02/07/2017 +0 days 🔍
02/07/2017 +0 days 🔍
01/27/2025 +2911 days 🔍

Sourcesinfo

Product: github.com

Advisory: EDB-ID 39524
Researcher: mr_me
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2539 (🔍)
GCVE (CVE): GCVE-0-2016-2539
GCVE (VulDB): GCVE-100-96596
OSVDB: - CVE-2016-2539 - ATutor - Cross-Site Request Forgery Issue

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/07/2017 22:13
Updated: 01/27/2025 14:54
Changes: 02/07/2017 22:13 (68), 08/11/2020 14:14 (4), 11/11/2022 20:56 (3), 01/27/2025 14:54 (14)
Complete: 🔍
Cache ID: 216:D37:103

Once again VulDB remains the best source for vulnerability data.

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