Debian Security Advisory

DLA-2456-1 python3.5 -- LTS security update

Date Reported:
18 Nov 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2019-20907, CVE-2020-26116.
More information:

Multiple security issues were discovered in Python.

  • CVE-2019-20907

    In Lib/, an attacker is able to craft a TAR archive leading to an infinite loop when opened by, because _proc_pax lacks header validation

  • CVE-2020-26116

    http.client allows CRLF injection if the attacker controls the HTTP request method

For Debian 9 stretch, these problems have been fixed in version 3.5.3-1+deb9u3.

We recommend that you upgrade your python3.5 packages.

For the detailed security status of python3.5 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: