Squid Proxy 2.3stable3/2.3stable4 ACL httpd_accel_host/http_accel_with_proxy privileges management

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in Squid Proxy 2.3stable3/2.3stable4 and classified as critical. Affected is the function httpd_accel_host/http_accel_with_proxy of the component ACL Handler. The manipulation leads to privileges management. This vulnerability is uniquely identified as CVE-2001-1030. No exploit exists. This vulnerability is considered historic because of its background and reception. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Squid Proxy 2.3stable3/2.3stable4 (Firewall Software). It has been rated as critical. This issue affects the function httpd_accel_host/http_accel_with_proxy of the component ACL Handler. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Squid before 2.3STABLE5 in HTTP accelerator mode does not enable access control lists (ACLs) when the httpd_accel_host and http_accel_with_proxy off settings are used, which allows attackers to bypass the ACLs and conduct unauthorized activities such as port scanning.

The bug was discovered 07/18/2001. The weakness was disclosed 07/18/2001 by Paul (Website). It is possible to read the advisory at xforce.iss.net. The identification of this vulnerability is CVE-2001-1030. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/30/2025). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. Due to its background and reception, this vulnerability has a historic impact.

The vulnerability scanner Nessus provides a plugin with the ID 13881 (Mandrake Linux Security Advisory : squid (MDKSA-2001:066)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86181 (Squid Reverse Proxy Vulnerability).

Upgrading eliminates this vulnerability. A possible mitigation has been published 1 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (6862), Tenable (13881), SecurityFocus (BID 3062†), OSVDB (5476†) and Vulnerability Center (SBV-13755†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 13881
Nessus Name: Mandrake Linux Security Advisory : squid (MDKSA-2001:066)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

07/18/2001 🔍
07/18/2001 +0 days 🔍
07/18/2001 +0 days 🔍
07/18/2001 +0 days 🔍
07/18/2001 +0 days 🔍
07/25/2001 +7 days 🔍
07/31/2004 +1102 days 🔍
01/02/2007 +885 days 🔍
07/07/2014 +2743 days 🔍
09/30/2025 +4103 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: xforce.iss.net
Researcher: Paul
Status: Confirmed

CVE: CVE-2001-1030 (🔍)
GCVE (CVE): GCVE-0-2001-1030
GCVE (VulDB): GCVE-100-17027
X-Force: 6862
SecurityFocus: 3062 - Squid Web Proxy Reverse Proxy Vulnerability
OSVDB: 5476 - CVE-2001-1030 - Caldera - Openlinux Server - High
Vulnerability Center: 13755 - Squid HTTP Accelerator Mode ACL Bypass, High

Entryinfo

Created: 07/07/2014 14:41
Updated: 09/30/2025 07:03
Changes: 07/07/2014 14:41 (68), 07/13/2019 09:32 (7), 09/30/2025 07:03 (20)
Complete: 🔍
Cache ID: 216::103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!