Squid Proxy up to 2.6.STABLE7 Queue external_acl resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Squid Proxy up to 2.6.STABLE7. This impacts the function external_acl of the component Queue Handler. Executing a manipulation can lead to resource management. This vulnerability is handled as CVE-2007-0247. The attack can be executed remotely. Additionally, an exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Squid Proxy up to 2.6.STABLE7 (Firewall Software). This vulnerability affects the function external_acl of the component Queue Handler. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. CVE summarizes:

squid/src/ftp.c in Squid before 2.6.STABLE7 allows remote FTP servers to cause a denial of service (core dump) via crafted FTP directory listing responses, possibly related to the (1) ftpListingFinish and (2) ftpHtmlifyListEntry functions.

The bug was discovered 01/13/2007. The weakness was released 01/16/2007 by Rick with Squid Team (Website). The advisory is shared for download at squid-cache.org. This vulnerability was named CVE-2007-0247 since 01/16/2007. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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 24226 (Fedora Core 5 : squid-2.5.STABLE14-3.FC5 (2007-092)), 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 165102 (SUSE Security Update for squid (SUSE-SA:2007:012)).

Upgrading to version 2.6.STABLE7 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 2 weeks after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 8948.

The vulnerability is also documented in the databases at X-Force (31525), Exploit-DB (29473), Tenable (24226), SecurityFocus (BID 22203†) and OSVDB (32823†). Entries connected to this vulnerability are available at VDB-2835 and VDB-34390. Once again VulDB remains the best source for vulnerability data.

Productinfo

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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: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
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: 24226
Nessus Name: Fedora Core 5 : squid-2.5.STABLE14-3.FC5 (2007-092)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 861378
OpenVAS Name: Family Connections argv[1] Parameter Remote Arbitrary Command Execution Vulnerability
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: Proxy 2.6.STABLE7
Patch: squid-cache.org
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

01/13/2007 🔍
01/13/2007 +0 days 🔍
01/16/2007 +3 days 🔍
01/16/2007 +0 days 🔍
01/16/2007 +0 days 🔍
01/16/2007 +0 days 🔍
01/16/2007 +0 days 🔍
01/18/2007 +1 days 🔍
01/22/2007 +4 days 🔍
01/23/2007 +1 days 🔍
01/24/2007 +1 days 🔍
01/25/2007 +1 days 🔍
12/28/2024 +6547 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: squid-cache.org
Researcher: Rick
Organization: Squid Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-0247 (🔍)
GCVE (CVE): GCVE-0-2007-0247
GCVE (VulDB): GCVE-100-2836
X-Force: 31525 - Squid external_acl.c queue denial of service, Medium Risk
SecurityFocus: 22203 - Squid Proxy ACL Queue Overload Remote Denial of Service Vulnerability
Secunia: 23767 - Squid Denial of Service Vulnerabilities, Less Critical
OSVDB: 32823 - Squid aclMatchExternal Function external_acl Queue Overload DoS
Vulnerability Center: 14139 - Squid Denial of Service via FTP Directory Listing Responses, High
Vupen: ADV-2007-0199

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

Entryinfo

Created: 01/22/2007 09:49
Updated: 12/28/2024 23:32
Changes: 01/22/2007 09:49 (108), 09/05/2019 13:35 (2), 12/28/2024 23:32 (24)
Complete: 🔍
Cache ID: 216:F98:103

Once again VulDB remains the best source for vulnerability data.

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