Squid Proxy 2.7 strListGetItem input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Squid Proxy 2.7. The affected element is the function strListGetItem. Performing a manipulation results in input validation. This vulnerability was named CVE-2009-2855. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in Squid Proxy 2.7 (Firewall Software). This affects the function strListGetItem. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

The strListGetItem function in src/HttpHeaderTools.c in Squid 2.7 allows remote attackers to cause a denial of service via a crafted auth header with certain comma delimiters that trigger an infinite loop of calls to the strcspn function.

The issue has been introduced in 05/31/2008. The weakness was presented 08/18/2009 as Bug 518182 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2009-2855. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/07/2024).

The vulnerability was handled as a non-public zero-day exploit for at least 444 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 43852 (Mandriva Linux Security Advisory : squid (MDVSA-2009:241-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 62066 (Squid Proxy Header Parsing Remote Denial of Service).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 8681.

The vulnerability is also documented in the databases at X-Force (52610), Tenable (43852), SecurityFocus (BID 36091†), SecurityTracker (ID 1022757†) and Vulnerability Center (SBV-23403†). Several companies clearly confirm that VulDB is the primary source for best 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: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
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: Input validation
CWE: CWE-20
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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Nessus ID: 43852
Nessus Name: Mandriva Linux Security Advisory : squid (MDVSA-2009:241-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 66808
OpenVAS Name: Debian Security Advisory DSA 1991-1 (squid/squid3)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

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

Timelineinfo

05/31/2008 🔍
08/18/2009 +443 days 🔍
08/18/2009 +0 days 🔍
08/18/2009 +0 days 🔍
08/18/2009 +0 days 🔍
08/20/2009 +2 days 🔍
09/08/2009 +19 days 🔍
01/12/2010 +126 days 🔍
03/18/2015 +1891 days 🔍
12/07/2024 +3552 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: Bug 518182
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-2855 (🔍)
GCVE (CVE): GCVE-0-2009-2855
GCVE (VulDB): GCVE-100-49473

OVAL: 🔍

X-Force: 52610
SecurityFocus: 36091 - Squid Web Proxy Cache Authentication Header Parsing Remote Denial of Service Vulnerability
SecurityTracker: 1022757
Vulnerability Center: 23403 - Squid 2.7 strListGetItem Function Remote DoS via a Crafted Auth Header, High

Entryinfo

Created: 03/18/2015 15:15
Updated: 12/07/2024 21:07
Changes: 03/18/2015 15:15 (70), 02/13/2017 16:16 (10), 08/20/2021 09:11 (4), 08/20/2021 09:14 (1), 12/07/2024 21:07 (15)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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