Symfony up to 4.4.6 Response Content-Type denial of service

entryeditHistoryDiffjsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
2.3	$0-$5k	0.00

A vulnerability was found in Symfony up to 4.4.6. It has been classified as problematic. This affects an unknown function of the component Response Handler. The manipulation as part of a Content-Type leads to a denial of service vulnerability. CWE is classifying the issue as CWE-435. This is going to have an impact on availability. The summary by CVE is:

In Symfony before version 4.4, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response's content and `Content-Type` header. When the response is cached, this can prevent the use of the website by other users. This has been patched in version 4.4.

The weakness was shared 03/30/2020 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2020-5255 since 01/02/2020. The exploitability is told to be difficult. It is possible to initiate the attack remotely. The successful exploitation requires a authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 4.4.7 eliminates this vulnerability.

The entry 152440 is related to this item.

Productinfoedit

Name

Symfony

CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 2.6
VulDB Meta Temp Score: 2.3

VulDB Base Score: 2.6
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 2.6
NVD Vector: 🔒

CVSSv2infoedit

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Denial of service
CWE: CWE-435
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Economy: 🔍
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Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Symfony 4.4.7

Timelineinfoedit

01/02/2020 CVE assigned
03/30/2020 +88 days Advisory disclosed
03/31/2020 +1 days VulDB entry created
10/05/2020 +188 days VulDB last update

Sourcesinfoedit

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

CVE: CVE-2020-5255 (🔒)
See also: 🔒

Entryinfoedit

Created: 03/31/2020 10:33 AM
Updated: 10/05/2020 10:14 AM
Changes: (1) advisory_confirm_url
Complete: 🔍