squidGuard 1.4 Locking memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as critical has been found in squidGuard 1.4 (Firewall Software). Affected is an unknown part of the component Locking. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. CVE summarizes:

Multiple buffer overflows in squidGuard 1.4 allow remote attackers to bypass intended URL blocking via a long URL, related to (1) the relationship between a certain buffer size in squidGuard and a certain buffer size in Squid and (2) a redirect URL that contains information about the originally requested URL.

The weakness was shared 10/23/2009 (Website). The advisory is available at vupen.com. This vulnerability is traded as CVE-2009-3826. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 46213 (Debian DSA-2040-1 : squidguard - buffer overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165212 (SUSE Security Update for Multiple Packages (SUSE-SR:2010:014)).

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 databases at X-Force (53922) and Tenable (46213). The entries 51880, 51780, 50633 and 53524 are related to this item.




CPE 2.3info

CPE 2.2info


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

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍


Nessus ID: 46213
Nessus Name: Debian DSA-2040-1 : squidguard - buffer overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 67341
OpenVAS Name: Debian Security Advisory DSA 2040-1 (squidguard)
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Threat Intelligenceinfo

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Recommended: no mitigation known
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10/23/2009 🔍
10/23/2009 +0 days 🔍
10/23/2009 +0 days 🔍
10/23/2009 +0 days 🔍
10/28/2009 +4 days 🔍
10/28/2009 +0 days 🔍
11/08/2009 +11 days 🔍
03/18/2015 +1956 days 🔍
08/24/2021 +2351 days 🔍


Advisory: vupen.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-3826 (🔍)

X-Force: 53922
Vulnerability Center: 23936 - squidGuard 1.3 and 1.4 URL Blocking Bypass Vulnerability via Long URL, Medium
SecurityFocus: 36800 - squidGuard Multiple Security Bypass Vulnerabilities
OSVDB: 59164 - squidGuard Long URL Handling Multiple Method Filter Bypass

See also: 🔍


Created: 03/18/2015 03:15 PM
Updated: 08/24/2021 05:44 PM
Changes: 03/18/2015 03:15 PM (62), 02/16/2017 10:10 AM (9), 08/24/2021 05:37 PM (4), 08/24/2021 05:44 PM (1)
Complete: 🔍


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