Squid Proxy up to 3.3.2 Service errorpage.cc strHdrAcptLangGetItem input validation

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

Summaryinfo

A vulnerability identified as problematic has been detected in Squid Proxy. This issue affects the function strHdrAcptLangGetItem of the file errorpage.cc of the component Service. This manipulation causes input validation. This vulnerability is handled as CVE-2013-1839. Additionally, an exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Squid Proxy (Firewall Software). It has been declared as critical. Affected by this vulnerability is the function strHdrAcptLangGetItem of the file errorpage.cc of the component Service. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

The strHdrAcptLangGetItem function in errorpage.cc in Squid 3.2.x before 3.2.9 and 3.3.x before 3.3.3 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a "," character in an Accept-Language header.

The issue has been introduced in 08/02/2010. The weakness was released 03/05/2013 by 22733db72ab3ed94b5f8a1ffcde850251fe6f466, c8e74ebd8392fda4788179f9a02bb49337638e7b and AKAT-1 as 120667 as confirmed exploit (Packetstorm). It is possible to read the advisory at packetstormsecurity.com. The vendor was not involved in the public release. This vulnerability is known as CVE-2013-1839 since 02/19/2013. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

A public exploit has been developed by 22733db72ab3ed94b5f8a1ffcde850251fe6f466/c8e74ebd8392fda4788179f and been published immediately after the advisory. It is possible to download the exploit at packetstormsecurity.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 946 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 65825 (Fedora 17 : squid-3.2.9-1.fc17 (2013-4063)), 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 115176 (Squid Proxy Language Negotiation Denial of Service Vulnerability).

Upgrading to version 3.2.9 eliminates this vulnerability. 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 13299.

The vulnerability is also documented in the databases at X-Force (82661), Tenable (65825), SecurityFocus (BID 58316†), OSVDB (90910†) and Secunia (SA52588†). Entry connected to this vulnerability is available at VDB-7890. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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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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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: 22733db72ab3ed94b5f8a1ffcde850251fe6f466/c8e74ebd8392fda4788179f
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 65825
Nessus Name: Fedora 17 : squid-3.2.9-1.fc17 (2013-4063)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 866446
OpenVAS Name: Fedora Update for squid FEDORA-2013-13493
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Proxy 3.2.9
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

08/02/2010 🔍
02/19/2013 +932 days 🔍
03/05/2013 +14 days 🔍
03/05/2013 +0 days 🔍
03/05/2013 +0 days 🔍
03/05/2013 +0 days 🔍
03/08/2013 +3 days 🔍
03/12/2013 +4 days 🔍
03/12/2013 +0 days 🔍
03/14/2013 +2 days 🔍
03/27/2013 +13 days 🔍
04/07/2013 +11 days 🔍
09/30/2013 +176 days 🔍
12/27/2024 +4106 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: 120667
Researcher: 22733db72ab3ed94b5f8a1ffcde850251fe6f466, c8e74ebd8392fda4788179f9a02bb49337638e7b, AKAT-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-1839 (🔍)
GCVE (CVE): GCVE-0-2013-1839
GCVE (VulDB): GCVE-100-7891
X-Force: 82661
SecurityFocus: 58316 - Squid 'strHdrAcptLangGetItem()' Function Remote Denial of Service Vulnerability
Secunia: 52588 - Squid "strHdrAcptLangGetItem()" Denial of Service Vulnerability, Moderately Critical
OSVDB: 90910
SecurityTracker: 1028282
Vulnerability Center: 38930 - Squid-Cache Remote Denial of Service due to Improper Parsing of Accept-Language Headers, High

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

Entryinfo

Created: 03/08/2013 10:49
Updated: 12/27/2024 17:26
Changes: 03/08/2013 10:49 (102), 11/23/2018 10:47 (2), 12/27/2024 17:26 (18)
Complete: 🔍
Committer:
Cache ID: 216::103

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

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