Squid Proxy up to 2.5 htcp.c htcpHandleTstRequest null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in Squid Proxy up to 2.5 and classified as problematic. Impacted is the function htcpHandleTstRequest of the file htcp.c. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2010-0639. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Squid Proxy up to 2.5 (Firewall Software). Affected by this vulnerability is the function htcpHandleTstRequest of the file htcp.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

The htcpHandleTstRequest function in htcp.c in Squid 2.x before 2.6.STABLE24 and 2.7 before 2.7.STABLE8, and htcp.cc in 3.0 before 3.0.STABLE24, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets to the HTCP port.

The weakness was shared 02/12/2010 (Website). It is possible to read the advisory at squid-cache.org. This vulnerability is known as CVE-2010-0639 since 02/15/2010. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 75745 (openSUSE Security Update : squid (openSUSE-SU-2012:0102-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195052 (Ubuntu Security Notification for Squid Vulnerability (USN-904-1)).

Upgrading to version 2.6 eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11516.

The vulnerability is also documented in the databases at Tenable (75745), SecurityFocus (BID 38212†), OSVDB (62297†), Secunia (SA38812†) and SecurityTracker (ID 1023587†). 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: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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: 75745
Nessus Name: openSUSE Security Update : squid (openSUSE-SU-2012:0102-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 66847
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: 🔍

Upgrade: Proxy 2.6
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

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

Timelineinfo

02/12/2010 🔍
02/12/2010 +0 days 🔍
02/12/2010 +0 days 🔍
02/12/2010 +0 days 🔍
02/12/2010 +0 days 🔍
02/15/2010 +2 days 🔍
02/15/2010 +0 days 🔍
02/22/2010 +7 days 🔍
03/01/2010 +7 days 🔍
06/13/2014 +1565 days 🔍
03/18/2015 +278 days 🔍
04/30/2026 +4061 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: squid-cache.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2010-0639 (🔍)
GCVE (CVE): GCVE-0-2010-0639
GCVE (VulDB): GCVE-100-51859

OVAL: 🔍

SecurityFocus: 38212 - Squid Web Proxy Cache HTCP Request Processing Remote Denial of Service Vulnerability
Secunia: 38812 - Fedora update for squid, Less Critical
OSVDB: 62297 - Squid htcp.cc htcpHandleTstRequest Function Crafted HTCP Request NULL Dereference DoS
SecurityTracker: 1023587 - Squid HTCP Packet Processing NULL Pointer Dereference Lets Remote Users Deny Service
Vulnerability Center: 24897 - Squid \x3C 3.0.STABLE24 htcpHandleTstRequest Function Remote DoS Vulnerability, Medium
Vupen: ADV-2010-0371

Entryinfo

Created: 03/18/2015 15:15
Updated: 04/30/2026 22:56
Changes: 03/18/2015 15:15 (71), 02/21/2017 17:12 (20), 09/02/2021 10:11 (3), 02/01/2025 18:53 (18), 04/30/2026 22:56 (1)
Complete: 🔍
Cache ID: 216::103

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

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