Squid Proxy up to 2.6.STABLE11 TRACE Request denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Squid Proxy up to 2.6.STABLE11. It has been classified as problematic. The affected element is an unknown function of the component TRACE Request Handler. The manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2007-1560. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Squid Proxy up to 2.6.STABLE11 (Firewall Software). It has been rated as problematic. This issue affects an unknown code block of the component TRACE Request Handler. 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. The summary by CVE is:

The clientProcessRequest() function in src/client_side.c in Squid 2.6 before 2.6.STABLE12 allows remote attackers to cause a denial of service (daemon crash) via crafted TRACE requests that trigger an assertion error.

The weakness was disclosed 03/23/2007 with Squid Projekt (Website). It is possible to read the advisory at squid-cache.org. The identification of this vulnerability is CVE-2007-1560 since 03/21/2007. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 67467 (Oracle Linux 5 : squid (ELSA-2007-0131)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156086 (Oracle Enterprise Linux Update for Squid (ELSA-2007-0131)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at squid-cache.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 15941. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 12430.

The vulnerability is also documented in the databases at X-Force (33124), Tenable (67467), SecurityFocus (BID 23085†), OSVDB (34367†) and Secunia (SA24911†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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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: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67467
Nessus Name: Oracle Linux 5 : squid (ELSA-2007-0131)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 58868
OpenVAS Name: FreeBSD Ports: squid
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: squid-cache.org

Snort ID: 15941
TippingPoint: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

03/21/2007 🔍
03/21/2007 +0 days 🔍
03/21/2007 +0 days 🔍
03/21/2007 +0 days 🔍
03/21/2007 +0 days 🔍
03/21/2007 +0 days 🔍
03/22/2007 +0 days 🔍
03/23/2007 +1 days 🔍
03/26/2007 +3 days 🔍
03/30/2007 +4 days 🔍
04/16/2007 +17 days 🔍
07/12/2013 +2279 days 🔍
06/09/2025 +4350 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: squid-cache.org
Organization: Squid Projekt
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-1560 (🔍)
GCVE (CVE): GCVE-0-2007-1560
GCVE (VulDB): GCVE-100-2987

OVAL: 🔍

X-Force: 33124 - Squid clientProcessRequest() function denial of service, Medium Risk
SecurityFocus: 23085 - Squid Proxy TRACE Request Remote Denial of Service Vulnerability
Secunia: 24911 - Red Hat update for squid, Moderately Critical
OSVDB: 34367 - Squid src/client_side.c clientProcessRequest() function TRACE Request DoS
SecurityTracker: 1017805 - Squid TRACE Method Bug Lets Remote Users Deny Service
Vulnerability Center: 14710 - Squid clientProcessRequest Function Denial of Service via Crafted TRACE Requests, Medium
Vupen: ADV-2007-1035

Entryinfo

Created: 03/30/2007 11:48
Updated: 06/09/2025 05:59
Changes: 03/30/2007 11:48 (90), 06/07/2017 14:55 (13), 03/15/2021 11:01 (3), 06/09/2025 05:59 (16)
Complete: 🔍
Cache ID: 216:8B3:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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