VDB-177724 · CVE-2021-33503 · GCVE-0-2021-33503

urllib3 up to 1.26.4 Authority a incorrect regex

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.
3.4	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in urllib3 up to 1.26.4. This affects an unknown function of the component Authority. Executing a manipulation of the argument a can lead to incorrect regex. The identification of this vulnerability is CVE-2021-33503. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in urllib3 up to 1.26.4. This vulnerability affects an unknown functionality of the component Authority. The manipulation of the argument a with an unknown input leads to a incorrect regex vulnerability. The CWE definition for the vulnerability is CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. As an impact it is known to affect availability.

The weakness was shared 06/29/2021. The advisory is shared for download at github.com. This vulnerability was named CVE-2021-33503. There are known technical details, but no exploit is available.

Upgrading to version 1.26.5 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

urllib3

Version

License

open-source

Website

Product: https://github.com/urllib3/urllib3/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

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

Exploitinginfo

Class: Incorrect regex
CWE: CWE-185 / CWE-697
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: urllib3 1.26.5
Patch: github.com

Timelineinfo

05/21/2021 🔍
06/29/2021 +39 days 🔍
06/29/2021 +0 days 🔍
07/03/2021 +4 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-33503 (🔍)
GCVE (CVE): GCVE-0-2021-33503
GCVE (VulDB): GCVE-100-177724

Entryinfo

Created: 06/29/2021 14:32
Updated: 07/03/2021 14:48
Changes: 06/29/2021 14:32 (39), 07/03/2021 14:48 (6)
Complete: 🔍
Cache ID: 216::103