Moodle up to 1.9.4 $$ input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Moodle. This vulnerability affects unknown code. This manipulation of the argument $$ causes input validation. This vulnerability appears as CVE-2009-1171. In addition, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Moodle (Learning Management Software). Affected by this vulnerability is some unknown functionality. The manipulation of the argument $$ with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality. The summary by CVE is:

The TeX filter in Moodle 1.6 before 1.6.9+, 1.7 before 1.7.7+, 1.8 before 1.8.9, and 1.9 before 1.9.5 allows user-assisted attackers to read arbitrary files via an input command in a "$$" sequence, which causes LaTeX to include the contents of the file.

The bug was discovered 03/27/2009. The weakness was presented 03/30/2009 (Website). The advisory is shared at redhat.com. This vulnerability is known as CVE-2009-1171 since 03/30/2009. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is possible to download the exploit 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 3 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 36905 (Fedora 10 : moodle-1.9.4-6.fc10 (2009-3280)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175186 (Debian Security Update for Moodle (DSA-1761)).

Upgrading to version 1.9.3 eliminates this vulnerability. A possible mitigation has been published 3 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (49504), Exploit-DB (8297), Tenable (36905), SecurityFocus (BID 34278†) and OSVDB (52998†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 36905
Nessus Name: Fedora 10 : moodle-1.9.4-6.fc10 (2009-3280)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 63734
OpenVAS Name: Debian Security Advisory DSA 1761-1 (moodle)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Moodle 1.9.3

Timelineinfo

03/27/2009 🔍
03/27/2009 +0 days 🔍
03/27/2009 +0 days 🔍
03/30/2009 +3 days 🔍
03/30/2009 +0 days 🔍
03/30/2009 +0 days 🔍
03/31/2009 +1 days 🔍
04/02/2009 +2 days 🔍
04/06/2009 +4 days 🔍
04/23/2009 +17 days 🔍
03/17/2015 +2154 days 🔍
04/19/2025 +3686 days 🔍

Sourcesinfo

Product: moodle.org

Advisory: redhat.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-1171 (🔍)
GCVE (CVE): GCVE-0-2009-1171
GCVE (VulDB): GCVE-100-47413

OVAL: 🔍

X-Force: 49504
SecurityFocus: 34278 - Moodle TeX Filter Remote File Disclosure Vulnerability
Secunia: 34517 - Moodle TeX Notation Filter Information Disclosure, Less Critical
OSVDB: 52998 - Moodle - TeX Filter Remote File Disclosure Issue
Vulnerability Center: 21482 - Moodle <1.9.5 Tex Filter Allows Remote Attackers to Read Arbitrary Files via a Command in a TeX File, Medium

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

Entryinfo

Created: 03/17/2015 23:38
Updated: 04/19/2025 22:51
Changes: 03/17/2015 23:38 (80), 08/31/2019 18:40 (8), 11/25/2024 17:35 (19), 04/19/2025 22:51 (2)
Complete: 🔍
Cache ID: 216:750:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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