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Red Hat Enterprise Linux 8: RHSA-2021-4161-02 Moderate: python-jinja2 ReDoS

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
This release tackles a Medium security concern in python-flask, improving robustness and safety for Ubuntu clients.
An update for python-jinja2 is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

For the update to take effect, all applications using Jinja2 must be restarted.

Summary

The python-jinja2 package contains Jinja2, a template engine written in pure Python. Jinja2 provides a Django inspired non-XML syntax but supports inline expressions and an optional sandboxed environment.
Security Fix(es):
* python-jinja2: ReDoS vulnerability due to the sub-pattern (CVE-2020-28493)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory security update Red Hat Enterprise Linux Moderate python-jinja2 template engine ReDoS

References

https://access.redhat.com/security/cve/CVE-2020-28493 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.5_release_notes/index

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: python-jinja2-2.10.1-3.el8.src.rpm
noarch: python3-jinja2-2.10.1-3.el8.noarch.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:4161-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4161
Issue date: 2021-11-09

Topic

An update for python-jinja2 is now available for Red Hat Enterprise Linux8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security update Red Hat Enterprise Linux Moderate python-jinja2 template engine ReDoS

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - noarch

Bugs Fixed

1928707 - CVE-2020-28493 python-jinja2: ReDoS vulnerability in the urlize filter

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