Opened 20 months ago
Closed 20 months ago
Last modified 20 months ago
New point version
Improve the speed of the urlize filter by reducing regex backtracking. Email matching requires a word character at the start of the domain part, and only word characters in the TLD. #1343
Fixed at r24174
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
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
The package python-jinja before version 2.11.3-1 is vulnerable to
denial of service.
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.
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.
A remote user might cause a huge CPU utilization via specially crafted
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