Squid Proxy 2.5 Stable/3 Pre NTLM Authentication Helper memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

A vulnerability was found in Squid Proxy 2.5 Stable/3 Pre (Firewall Software) and classified as critical. Affected by this issue is an unknown code block of the component NTLM Authentication Helper. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the ntlm_check_auth (NTLM authentication) function for Squid Web Proxy Cache 2.5.x and 3.x, when compiled with NTLM handlers enabled, allows remote attackers to execute arbitrary code via a long password ("pass" variable).

The bug was discovered 06/09/2004. The weakness was presented 06/08/2004 with iDEFENSE (Website). The advisory is available at idefense.com. This vulnerability is handled as CVE-2004-0541 since 06/04/2004. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

After 2 days, there has been an exploit disclosed. The exploit is available at metasploit.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 622 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 14524 (GLSA-200406-13 : Squid: NTLM authentication helper buffer overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at squid-cache.org. A possible mitigation has been published 1 days after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 12362. In this case the pattern Proxy-Authorization|3A| NTLM TlRMTVNTUAADA is used for detection.

The vulnerability is also documented in the databases at X-Force (16360), Exploit-DB (16847), Tenable (14524), SecurityFocus (BID 10500†) and OSVDB (6791†). idefense.com is providing further details. See VDB-708 and VDB-823 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

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Nessus ID: 14524
Nessus Name: GLSA-200406-13 : Squid: NTLM authentication helper buffer overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
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Nessus Port: 🔍

OpenVAS ID: 52454
OpenVAS Name: FreeBSD Ports: squid
OpenVAS File: 🔍
OpenVAS Family: 🔍

MetaSploit ID: squid_ntlm_authenticate.rb
MetaSploit Name: Squid NTLM Authenticate Overflow
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Patch: squid-cache.org

Snort ID: 12362
Snort Message: EXPLOIT Squid HTTP Proxy-Authorization overflow
Snort Pattern: 🔍

Timelineinfo

09/25/2002 🔍
06/04/2004 +618 days 🔍
06/08/2004 +4 days 🔍
06/09/2004 +1 days 🔍
06/09/2004 +0 days 🔍
06/09/2004 +0 days 🔍
06/09/2004 +0 days 🔍
06/09/2004 +0 days 🔍
06/09/2004 +0 days 🔍
08/06/2004 +57 days 🔍
08/30/2004 +24 days 🔍
01/01/2025 +7429 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: idefense.com⛔
Researcher: http://www.idefense.com
Organization: iDEFENSE
Status: Confirmed

CVE: CVE-2004-0541 (🔍)
GCVE (CVE): GCVE-0-2004-0541
GCVE (VulDB): GCVE-100-698

OVAL: 🔍

X-Force: 16360 - Squid Web Proxy Cache NTLM buffer overflow, High Risk
SecurityFocus: 10500 - Squid Proxy NTLM Authentication Buffer Overflow Vulnerability
Secunia: 11804 - Squid NTLM Authentication Helper Buffer Overflow Vulnerability, Highly Critical
OSVDB: 6791 - Squid ntlm_check_auth Function NTLM Authentication Helper Password Handling Remote Overflow
Vulnerability Center: 4853

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/09/2004 10:48 AM
Updated: 01/01/2025 02:00 AM
Changes: 06/09/2004 10:48 AM (101), 06/28/2019 04:43 PM (5), 07/02/2024 06:36 AM (16), 01/01/2025 02:00 AM (5)
Complete: 🔍
Cache ID: 18:800:40

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