#14589: Jinja2-2.11.3
-------------------------+---------------------
Reporter: renodr | Owner: renodr
Type: enhancement | Status: closed
Priority: high | Milestone: 10.1
Component: BOOK | Version: SVN
Severity: normal | Resolution: fixed
Keywords: |
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Changes (by renodr):
* priority: normal => high
Comment:
Checking my email this morning, I discovered that Jinja2-2.11.3 fixed a
CVE. CVE-2020-28493 - I'll fill out the SA with the other two today
(PostgreSQL / XTerm). I'll mark this one as Low / Medium severity
{{{
Arch Linux Security Advisory ASA-202102-19
==========================================
Severity: Low
Date : 2021-02-07
CVE-ID : CVE-2020-28493
Package : python-jinja
Type : denial of service
Remote : Yes
Link : https://security.archlinux.org/AVG-1523
Summary
=======
The package python-jinja before version 2.11.3-1 is vulnerable to
denial of service.
Resolution
==========
Upgrade to 2.11.3-1.
# pacman -Syu "python-jinja>=2.11.3-1"
The problem has been fixed upstream in version 2.11.3.
Workaround
==========
None.
Description
===========
A security issue was found in python-jinja before version 2.11.3. The
regular expression denial of service vulnerability is mainly due to the
sub-pattern [a-zA-Z0-9._-]+.[a-zA-Z0-9._-]+ This issue can be mitigated
by Markdown to format user content instead of the urlize filter, or by
implementing request timeouts and limiting process memory.
Impact
======
A remote user might cause a huge CPU utilization via specially crafted
input.
References
==========
https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994
https://github.com/pallets/jinja/pull/1343
https://github.com/pallets/jinja/commit/ef658dc3b6389b091d608e710a810ce8b87995b3
https://security.archlinux.org/CVE-2020-28493
}}}
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