Squid Proxy 1.1.20 Access Control Hexadecimal URL privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Squid Proxy 1.1.20. Affected by this vulnerability is an unknown functionality of the component Access Control Handler. Executing a manipulation as part of Hexadecimal URL can lead to privileges management. This vulnerability is registered as CVE-1999-1273. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Squid Proxy 1.1.20 (Firewall Software) and classified as critical. This vulnerability affects an unknown part of the component Access Control Handler. The manipulation as part of a Hexadecimal URL leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

squid internet object cache 1.1.20 allows users to bypass access control lists (acls) by encoding the url with hexadecimal escape sequences.

The issue has been introduced in 01/09/1998. The weakness was published 02/20/1998 as not defined posting (Bugtraq). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-1999-1273. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 42 days. During that time the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (1627) and SecurityTracker (ID 1627†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/09/1998 🔍
02/20/1998 +42 days 🔍
02/20/1998 +0 days 🔍
06/18/2014 +5962 days 🔍
04/17/2026 +4321 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: securityfocus.com⛔
Status: Confirmed

CVE: CVE-1999-1273 (🔍)
GCVE (CVE): GCVE-0-1999-1273
GCVE (VulDB): GCVE-100-14080
X-Force: 1627 - Squid regular expression ACLs can be bypassed
SecurityTracker: 1627

Entryinfo

Created: 06/19/2014 00:01
Updated: 04/17/2026 08:57
Changes: 06/19/2014 00:01 (50), 07/25/2018 08:25 (6), 04/17/2026 08:57 (18)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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