Squid Web Proxy up to 4.11/5.0.2 ContentLengthInterpreter.cc HTTP Request request smuggling

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Squid Web Proxy up to 4.11/5.0.2. It has been declared as critical. Impacted is an unknown function of the file http/ContentLengthInterpreter.cc. Executing a manipulation as part of HTTP Request can lead to request smuggling. This vulnerability is tracked as CVE-2020-15049. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Squid Web Proxy up to 4.11/5.0.2 (Firewall Software). This vulnerability affects some unknown processing of the file http/ContentLengthInterpreter.cc. The manipulation as part of a HTTP Request leads to a request smuggling vulnerability. The CWE definition for the vulnerability is CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing "+\ "-" or an uncommon shell whitespace character prefix to the length field-value.

The weakness was disclosed 06/30/2020 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability was named CVE-2020-15049 since 06/25/2020. The attack can be initiated remotely. Required for exploitation is a single authentication. There are known technical details, but no exploit is available.

Upgrading to version 4.12 or 5.0.3 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.2

VulDB Base Score: 7.4
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.9
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Request smuggling
CWE: CWE-444
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: 🔍

Upgrade: Web Proxy 4.12/5.0.3

Timelineinfo

06/25/2020 🔍
06/30/2020 +5 days 🔍
07/01/2020 +1 days 🔍
10/28/2020 +119 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-15049 (🔍)
GCVE (CVE): GCVE-0-2020-15049
GCVE (VulDB): GCVE-100-157492

Entryinfo

Created: 07/01/2020 10:42
Updated: 10/28/2020 08:33
Changes: 07/01/2020 10:42 (40), 07/01/2020 10:47 (12), 10/28/2020 08:27 (1), 10/28/2020 08:33 (1)
Complete: 🔍
Cache ID: 216::103

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