jinja2 up to 2.11.2 Markdown incorrect regex

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

A vulnerability was found in jinja2 up to 2.11.2 and classified as critical. This issue affects some unknown functionality of the component Markdown Handler. The manipulation with an unknown input leads to a incorrect regex vulnerability. Using CWE to declare the problem leads to CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. Impacted is availability.

The weakness was shared 02/02/2021 as SNYK-PYTHON-JINJA2-1012994. The advisory is shared at snyk.io. The identification of this vulnerability is CVE-2020-28493. Neither technical details nor an exploit are publicly available.

Upgrading to version 2.11.3 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.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

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: jinja2 2.11.3
Patch: github.com

Timelineinfo

11/12/2020 🔍
02/02/2021 +82 days 🔍
02/02/2021 +0 days 🔍
02/22/2021 +20 days 🔍

Sourcesinfo

Advisory: SNYK-PYTHON-JINJA2-1012994
Status: Confirmed

CVE: CVE-2020-28493 (🔍)

Entryinfo

Created: 02/02/2021 09:06
Updated: 02/22/2021 04:03
Changes: 02/02/2021 09:06 (39), 02/22/2021 03:56 (5), 02/22/2021 04:03 (8)
Complete: 🔍

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