Debian 9810 Published by

A python3.7 security update has been released for Debian GNU/Linux 10 LTS to address several vulnerabilities.

[SECURITY] [DLA 3477-1] python3.7 security update

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Debian LTS Advisory DLA-3477-1 Adrian Bunk
June 30, 2023
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Package : python3.7
Version : 3.7.3-2+deb10u5
CVE ID : CVE-2015-20107 CVE-2020-10735 CVE-2021-3426 CVE-2021-3733
CVE-2021-3737 CVE-2021-4189 CVE-2022-45061

Several vulnerabilities were fixed in the Python3 interpreter.


The mailcap module did not add escape characters into commands
discovered in the system mailcap file.


Prevent DoS with very large int.


Remove the pydoc getfile feature which could be abused to read
arbitrary files on the disk.


Regular Expression Denial of Service in urllib's AbstractBasicAuthHandler class.


Infinite loop in the HTTP client code.


Make ftplib not trust the PASV response.


Quadratic time in the IDNA decoder.

For Debian 10 buster, these problems have been fixed in version

We recommend that you upgrade your python3.7 packages.

For the detailed security status of python3.7 please refer to
its security tracker page at:

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: