Squid Proxy up to 2.5.STABLE10 NTLM Authentication denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Squid Proxy up to 2.5.STABLE10. The impacted element is an unknown function of the component NTLM Authentication. Such manipulation leads to denial of service. This vulnerability is listed as CVE-2005-2917. The attack may be performed from remote. There is no available exploit. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in Squid Proxy up to 2.5.STABLE10 (Firewall Software) and classified as critical. Affected by this issue is an unknown function of the component NTLM Authentication. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

Squid 2.5.STABLE10 and earlier, while performing NTLM authentication, does not properly handle certain request sequences, which allows attackers to cause a denial of service (daemon restart).

The bug was discovered 09/30/2005. The weakness was presented 09/30/2005 by Mike Diggins (Website). The advisory is available at squid-cache.org. This vulnerability is handled as CVE-2005-2917 since 09/15/2005. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 20010 (Squid Crafted NTLM Authentication Header DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Firewalls and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117736 (CentOS Security Update for Squid (CESA-2006:0045)).

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 immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 12520.

The vulnerability is also documented in the databases at X-Force (24282), Tenable (20010), SecurityFocus (BID 14977†), OSVDB (19607†) and Secunia (SA19161†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 20010
Nessus Name: Squid Crafted NTLM Authentication Header DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 55495
OpenVAS Name: Debian Security Advisory DSA 828-1 (squid)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: squid-cache.org
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

09/15/2005 🔍
09/16/2005 +1 days 🔍
09/22/2005 +6 days 🔍
09/22/2005 +0 days 🔍
09/30/2005 +7 days 🔍
09/30/2005 +0 days 🔍
09/30/2005 +0 days 🔍
09/30/2005 +0 days 🔍
10/04/2005 +4 days 🔍
10/10/2005 +6 days 🔍
10/12/2005 +2 days 🔍
06/29/2025 +7200 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: squid-cache.org
Researcher: Mike Diggins
Status: Confirmed

CVE: CVE-2005-2917 (🔍)
GCVE (CVE): GCVE-0-2005-2917
GCVE (VulDB): GCVE-100-1778

OVAL: 🔍

X-Force: 24282 - Squid NTLM authentication denial of service, Medium Risk
SecurityFocus: 14977 - Squid Proxy Client NTLM Authentication Denial Of Service Vulnerability
Secunia: 19161 - Red Hat update for squid, Moderately Critical
OSVDB: 19607 - Squid Crafted NTLM Authentication Header DoS
SecurityTracker: 1014920
Vulnerability Center: 9349 - Squid <=2.5.STABLE10 DoS through BTLM Authentication, High

Entryinfo

Created: 10/04/2005 11:44
Updated: 06/29/2025 10:15
Changes: 10/04/2005 11:44 (98), 07/04/2019 16:27 (1), 06/29/2025 10:15 (17)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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