First published: Tue Sep 14 2021(Updated: )
Function check_attachment_for_errors() in file data/general-hooks/ubuntu.py could be tricked into exposing private data via a constructed crash file. This issue affects: apport 2.14.1 versions prior to 2.14.1-0ubuntu3.29+esm8; 2.20.1 versions prior to 2.20.1-0ubuntu2.30+esm2; 2.20.9 versions prior to 2.20.9-0ubuntu7.26; 2.20.11 versions prior to 2.20.11-0ubuntu27.20; 2.20.11 versions prior to 2.20.11-0ubuntu65.3;
Credit: security@ubuntu.com security@ubuntu.com
Affected Software | Affected Version | How to fix |
---|---|---|
Canonical Apport | =2.14.1-0ubuntu1 | |
Canonical Apport | =2.14.1-0ubuntu2 | |
Canonical Apport | =2.14.1-0ubuntu3 | |
Canonical Apport | =2.14.1-0ubuntu3.1 | |
Canonical Apport | =2.14.1-0ubuntu3.2 | |
Canonical Apport | =2.14.1-0ubuntu3.3 | |
Canonical Apport | =2.14.1-0ubuntu3.4 | |
Canonical Apport | =2.14.1-0ubuntu3.5 | |
Canonical Apport | =2.14.1-0ubuntu3.6 | |
Canonical Apport | =2.14.1-0ubuntu3.7 | |
Canonical Apport | =2.14.1-0ubuntu3.8 | |
Canonical Apport | =2.14.1-0ubuntu3.9 | |
Canonical Apport | =2.14.1-0ubuntu3.10 | |
Canonical Apport | =2.14.1-0ubuntu3.11 | |
Canonical Apport | =2.14.1-0ubuntu3.12 | |
Canonical Apport | =2.14.1-0ubuntu3.13 | |
Canonical Apport | =2.14.1-0ubuntu3.14 | |
Canonical Apport | =2.14.1-0ubuntu3.15 | |
Canonical Apport | =2.14.1-0ubuntu3.16 | |
Canonical Apport | =2.14.1-0ubuntu3.17 | |
Canonical Apport | =2.14.1-0ubuntu3.18 | |
Canonical Apport | =2.14.1-0ubuntu3.19 | |
Canonical Apport | =2.14.1-0ubuntu3.20 | |
Canonical Apport | =2.14.1-0ubuntu3.21 | |
Canonical Apport | =2.14.1-0ubuntu3.23 | |
Canonical Apport | =2.14.1-0ubuntu3.24 | |
Canonical Apport | =2.14.1-0ubuntu3.25 | |
Canonical Apport | =2.14.1-0ubuntu3.27 | |
Canonical Apport | =2.14.1-0ubuntu3.28 | |
Canonical Apport | =2.14.1-0ubuntu3.29 | |
Canonical Apport | =2.14.1-0ubuntu3.29\+esm7 | |
Canonical Ubuntu Linux | =14.04 | |
Canonical Apport | =2.20.1-0ubuntu1 | |
Canonical Apport | =2.20.1-0ubuntu2 | |
Canonical Apport | =2.20.1-0ubuntu2.1 | |
Canonical Apport | =2.20.1-0ubuntu2.2 | |
Canonical Apport | =2.20.1-0ubuntu2.4 | |
Canonical Apport | =2.20.1-0ubuntu2.5 | |
Canonical Apport | =2.20.1-0ubuntu2.6 | |
Canonical Apport | =2.20.1-0ubuntu2.7 | |
Canonical Apport | =2.20.1-0ubuntu2.8 | |
Canonical Apport | =2.20.1-0ubuntu2.9 | |
Canonical Apport | =2.20.1-0ubuntu2.10 | |
Canonical Apport | =2.20.1-0ubuntu2.12 | |
Canonical Apport | =2.20.1-0ubuntu2.13 | |
Canonical Apport | =2.20.1-0ubuntu2.14 | |
Canonical Apport | =2.20.1-0ubuntu2.15 | |
Canonical Apport | =2.20.1-0ubuntu2.16 | |
Canonical Apport | =2.20.1-0ubuntu2.17 | |
Canonical Apport | =2.20.1-0ubuntu2.18 | |
Canonical Apport | =2.20.1-0ubuntu2.19 | |
Canonical Apport | =2.20.1-0ubuntu2.20 | |
Canonical Apport | =2.20.1-0ubuntu2.21 | |
Canonical Apport | =2.20.1-0ubuntu2.22 | |
Canonical Apport | =2.20.1-0ubuntu2.23 | |
Canonical Apport | =2.20.1-0ubuntu2.25 | |
Canonical Apport | =2.20.1-0ubuntu2.26 | |
Canonical Apport | =2.20.1-0ubuntu2.27 | |
Canonical Apport | =2.20.1-0ubuntu2.28 | |
Canonical Apport | =2.20.1-0ubuntu2.30 | |
Canonical Apport | =2.20.1-0ubuntu2.30\+esm1 | |
Canonical Ubuntu Linux | =16.04 | |
Canonical Apport | =2.20.9-0ubuntu1 | |
Canonical Apport | =2.20.9-0ubuntu2 | |
Canonical Apport | =2.20.9-0ubuntu3 | |
Canonical Apport | =2.20.9-0ubuntu4 | |
Canonical Apport | =2.20.9-0ubuntu5 | |
Canonical Apport | =2.20.9-0ubuntu6 | |
Canonical Apport | =2.20.9-0ubuntu7 | |
Canonical Apport | =2.20.9-0ubuntu7.1 | |
Canonical Apport | =2.20.9-0ubuntu7.2 | |
Canonical Apport | =2.20.9-0ubuntu7.3 | |
Canonical Apport | =2.20.9-0ubuntu7.4 | |
Canonical Apport | =2.20.9-0ubuntu7.5 | |
Canonical Apport | =2.20.9-0ubuntu7.6 | |
Canonical Apport | =2.20.9-0ubuntu7.7 | |
Canonical Apport | =2.20.9-0ubuntu7.8 | |
Canonical Apport | =2.20.9-0ubuntu7.9 | |
Canonical Apport | =2.20.9-0ubuntu7.10 | |
Canonical Apport | =2.20.9-0ubuntu7.11 | |
Canonical Apport | =2.20.9-0ubuntu7.12 | |
Canonical Apport | =2.20.9-0ubuntu7.13 | |
Canonical Apport | =2.20.9-0ubuntu7.14 | |
Canonical Apport | =2.20.9-0ubuntu7.15 | |
Canonical Apport | =2.20.9-0ubuntu7.16 | |
Canonical Apport | =2.20.9-0ubuntu7.17 | |
Canonical Apport | =2.20.9-0ubuntu7.18 | |
Canonical Apport | =2.20.9-0ubuntu7.19 | |
Canonical Apport | =2.20.9-0ubuntu7.20 | |
Canonical Apport | =2.20.9-0ubuntu7.21 | |
Canonical Apport | =2.20.9-0ubuntu7.23 | |
Canonical Apport | =2.20.9-0ubuntu7.24 | |
Canonical Ubuntu Linux | =18.04 | |
Canonical Apport | =2.20.11-0ubuntu8 | |
Canonical Apport | =2.20.11-0ubuntu9 | |
Canonical Apport | =2.20.11-0ubuntu10 | |
Canonical Apport | =2.20.11-0ubuntu11 | |
Canonical Apport | =2.20.11-0ubuntu12 | |
Canonical Apport | =2.20.11-0ubuntu13 | |
Canonical Apport | =2.20.11-0ubuntu14 | |
Canonical Apport | =2.20.11-0ubuntu15 | |
Canonical Apport | =2.20.11-0ubuntu16 | |
Canonical Apport | =2.20.11-0ubuntu17 | |
Canonical Apport | =2.20.11-0ubuntu18 | |
Canonical Apport | =2.20.11-0ubuntu19 | |
Canonical Apport | =2.20.11-0ubuntu20 | |
Canonical Apport | =2.20.11-0ubuntu21 | |
Canonical Apport | =2.20.11-0ubuntu22 | |
Canonical Apport | =2.20.11-0ubuntu23 | |
Canonical Apport | =2.20.11-0ubuntu24 | |
Canonical Apport | =2.20.11-0ubuntu25 | |
Canonical Apport | =2.20.11-0ubuntu26 | |
Canonical Apport | =2.20.11-0ubuntu27 | |
Canonical Apport | =2.20.11-0ubuntu27.2 | |
Canonical Apport | =2.20.11-0ubuntu27.3 | |
Canonical Apport | =2.20.11-0ubuntu27.4 | |
Canonical Apport | =2.20.11-0ubuntu27.5 | |
Canonical Apport | =2.20.11-0ubuntu27.6 | |
Canonical Apport | =2.20.11-0ubuntu27.7 | |
Canonical Apport | =2.20.11-0ubuntu27.8 | |
Canonical Apport | =2.20.11-0ubuntu27.9 | |
Canonical Apport | =2.20.11-0ubuntu27.10 | |
Canonical Apport | =2.20.11-0ubuntu27.11 | |
Canonical Apport | =2.20.11-0ubuntu27.12 | |
Canonical Apport | =2.20.11-0ubuntu27.13 | |
Canonical Apport | =2.20.11-0ubuntu27.14 | |
Canonical Apport | =2.20.11-0ubuntu27.16 | |
Canonical Apport | =2.20.11-0ubuntu27.17 | |
Canonical Apport | =2.20.11-0ubuntu27.18 | |
Canonical Ubuntu Linux | =20.04 | |
Canonical Apport | =2.20.11-0ubuntu28 | |
Canonical Apport | =2.20.11-0ubuntu29 | |
Canonical Apport | =2.20.11-0ubuntu30 | |
Canonical Apport | =2.20.11-0ubuntu31 | |
Canonical Apport | =2.20.11-0ubuntu32 | |
Canonical Apport | =2.20.11-0ubuntu33 | |
Canonical Apport | =2.20.11-0ubuntu34 | |
Canonical Apport | =2.20.11-0ubuntu35 | |
Canonical Apport | =2.20.11-0ubuntu36 | |
Canonical Apport | =2.20.11-0ubuntu37 | |
Canonical Apport | =2.20.11-0ubuntu38 | |
Canonical Apport | =2.20.11-0ubuntu39 | |
Canonical Apport | =2.20.11-0ubuntu40 | |
Canonical Apport | =2.20.11-0ubuntu41 | |
Canonical Apport | =2.20.11-0ubuntu42 | |
Canonical Apport | =2.20.11-0ubuntu43 | |
Canonical Apport | =2.20.11-0ubuntu44 | |
Canonical Apport | =2.20.11-0ubuntu45 | |
Canonical Apport | =2.20.11-0ubuntu46 | |
Canonical Apport | =2.20.11-0ubuntu47 | |
Canonical Apport | =2.20.11-0ubuntu48 | |
Canonical Apport | =2.20.11-0ubuntu49 | |
Canonical Apport | =2.20.11-0ubuntu50 | |
Canonical Apport | =2.20.11-0ubuntu50.1 | |
Canonical Apport | =2.20.11-0ubuntu50.2 | |
Canonical Apport | =2.20.11-0ubuntu50.3 | |
Canonical Apport | =2.20.11-0ubuntu50.5 | |
Canonical Apport | =2.20.11-0ubuntu50.7 | |
Canonical Apport | =2.20.11-0ubuntu51 | |
Canonical Apport | =2.20.11-0ubuntu52 | |
Canonical Apport | =2.20.11-0ubuntu53 | |
Canonical Apport | =2.20.11-0ubuntu54 | |
Canonical Apport | =2.20.11-0ubuntu55 | |
Canonical Apport | =2.20.11-0ubuntu56 | |
Canonical Apport | =2.20.11-0ubuntu57 | |
Canonical Apport | =2.20.11-0ubuntu58 | |
Canonical Apport | =2.20.11-0ubuntu59 | |
Canonical Apport | =2.20.11-0ubuntu60 | |
Canonical Apport | =2.20.11-0ubuntu61 | |
Canonical Apport | =2.20.11-0ubuntu62 | |
Canonical Apport | =2.20.11-0ubuntu63 | |
Canonical Apport | =2.20.11-0ubuntu64 | |
Canonical Apport | =2.20.11-0ubuntu65 | |
Canonical Apport | =2.20.11-0ubuntu65.1 | |
Canonical Ubuntu Linux | =21.04 | |
ubuntu/apport | <2.20.9-0ubuntu7.26 | 2.20.9-0ubuntu7.26 |
ubuntu/apport | <2.20.11-0ubuntu27.20 | 2.20.11-0ubuntu27.20 |
ubuntu/apport | <2.20.11-0ubuntu65.3 | 2.20.11-0ubuntu65.3 |
ubuntu/apport | <2.20.11-0ubuntu69 | 2.20.11-0ubuntu69 |
ubuntu/apport | <2.20.11-0ubuntu69 | 2.20.11-0ubuntu69 |
ubuntu/apport | <2.14.1-0ubuntu3.29+ | 2.14.1-0ubuntu3.29+ |
ubuntu/apport | <2.20.1-0ubuntu2.30+ | 2.20.1-0ubuntu2.30+ |
All of | ||
Canonical Ubuntu Linux | =14.04 | |
Any of | ||
Canonical Apport | =2.14.1-0ubuntu1 | |
Canonical Apport | =2.14.1-0ubuntu2 | |
Canonical Apport | =2.14.1-0ubuntu3 | |
Canonical Apport | =2.14.1-0ubuntu3.1 | |
Canonical Apport | =2.14.1-0ubuntu3.2 | |
Canonical Apport | =2.14.1-0ubuntu3.3 | |
Canonical Apport | =2.14.1-0ubuntu3.4 | |
Canonical Apport | =2.14.1-0ubuntu3.5 | |
Canonical Apport | =2.14.1-0ubuntu3.6 | |
Canonical Apport | =2.14.1-0ubuntu3.7 | |
Canonical Apport | =2.14.1-0ubuntu3.8 | |
Canonical Apport | =2.14.1-0ubuntu3.9 | |
Canonical Apport | =2.14.1-0ubuntu3.10 | |
Canonical Apport | =2.14.1-0ubuntu3.11 | |
Canonical Apport | =2.14.1-0ubuntu3.12 | |
Canonical Apport | =2.14.1-0ubuntu3.13 | |
Canonical Apport | =2.14.1-0ubuntu3.14 | |
Canonical Apport | =2.14.1-0ubuntu3.15 | |
Canonical Apport | =2.14.1-0ubuntu3.16 | |
Canonical Apport | =2.14.1-0ubuntu3.17 | |
Canonical Apport | =2.14.1-0ubuntu3.18 | |
Canonical Apport | =2.14.1-0ubuntu3.19 | |
Canonical Apport | =2.14.1-0ubuntu3.20 | |
Canonical Apport | =2.14.1-0ubuntu3.21 | |
Canonical Apport | =2.14.1-0ubuntu3.23 | |
Canonical Apport | =2.14.1-0ubuntu3.24 | |
Canonical Apport | =2.14.1-0ubuntu3.25 | |
Canonical Apport | =2.14.1-0ubuntu3.27 | |
Canonical Apport | =2.14.1-0ubuntu3.28 | |
Canonical Apport | =2.14.1-0ubuntu3.29 | |
Canonical Apport | =2.14.1-0ubuntu3.29\+esm7 | |
All of | ||
Canonical Ubuntu Linux | =16.04 | |
Any of | ||
Canonical Apport | =2.20.1-0ubuntu1 | |
Canonical Apport | =2.20.1-0ubuntu2 | |
Canonical Apport | =2.20.1-0ubuntu2.1 | |
Canonical Apport | =2.20.1-0ubuntu2.2 | |
Canonical Apport | =2.20.1-0ubuntu2.4 | |
Canonical Apport | =2.20.1-0ubuntu2.5 | |
Canonical Apport | =2.20.1-0ubuntu2.6 | |
Canonical Apport | =2.20.1-0ubuntu2.7 | |
Canonical Apport | =2.20.1-0ubuntu2.8 | |
Canonical Apport | =2.20.1-0ubuntu2.9 | |
Canonical Apport | =2.20.1-0ubuntu2.10 | |
Canonical Apport | =2.20.1-0ubuntu2.12 | |
Canonical Apport | =2.20.1-0ubuntu2.13 | |
Canonical Apport | =2.20.1-0ubuntu2.14 | |
Canonical Apport | =2.20.1-0ubuntu2.15 | |
Canonical Apport | =2.20.1-0ubuntu2.16 | |
Canonical Apport | =2.20.1-0ubuntu2.17 | |
Canonical Apport | =2.20.1-0ubuntu2.18 | |
Canonical Apport | =2.20.1-0ubuntu2.19 | |
Canonical Apport | =2.20.1-0ubuntu2.20 | |
Canonical Apport | =2.20.1-0ubuntu2.21 | |
Canonical Apport | =2.20.1-0ubuntu2.22 | |
Canonical Apport | =2.20.1-0ubuntu2.23 | |
Canonical Apport | =2.20.1-0ubuntu2.25 | |
Canonical Apport | =2.20.1-0ubuntu2.26 | |
Canonical Apport | =2.20.1-0ubuntu2.27 | |
Canonical Apport | =2.20.1-0ubuntu2.28 | |
Canonical Apport | =2.20.1-0ubuntu2.30 | |
Canonical Apport | =2.20.1-0ubuntu2.30\+esm1 | |
All of | ||
Canonical Ubuntu Linux | =18.04 | |
Any of | ||
Canonical Apport | =2.20.9-0ubuntu1 | |
Canonical Apport | =2.20.9-0ubuntu2 | |
Canonical Apport | =2.20.9-0ubuntu3 | |
Canonical Apport | =2.20.9-0ubuntu4 | |
Canonical Apport | =2.20.9-0ubuntu5 | |
Canonical Apport | =2.20.9-0ubuntu6 | |
Canonical Apport | =2.20.9-0ubuntu7 | |
Canonical Apport | =2.20.9-0ubuntu7.1 | |
Canonical Apport | =2.20.9-0ubuntu7.2 | |
Canonical Apport | =2.20.9-0ubuntu7.3 | |
Canonical Apport | =2.20.9-0ubuntu7.4 | |
Canonical Apport | =2.20.9-0ubuntu7.5 | |
Canonical Apport | =2.20.9-0ubuntu7.6 | |
Canonical Apport | =2.20.9-0ubuntu7.7 | |
Canonical Apport | =2.20.9-0ubuntu7.8 | |
Canonical Apport | =2.20.9-0ubuntu7.9 | |
Canonical Apport | =2.20.9-0ubuntu7.10 | |
Canonical Apport | =2.20.9-0ubuntu7.11 | |
Canonical Apport | =2.20.9-0ubuntu7.12 | |
Canonical Apport | =2.20.9-0ubuntu7.13 | |
Canonical Apport | =2.20.9-0ubuntu7.14 | |
Canonical Apport | =2.20.9-0ubuntu7.15 | |
Canonical Apport | =2.20.9-0ubuntu7.16 | |
Canonical Apport | =2.20.9-0ubuntu7.17 | |
Canonical Apport | =2.20.9-0ubuntu7.18 | |
Canonical Apport | =2.20.9-0ubuntu7.19 | |
Canonical Apport | =2.20.9-0ubuntu7.20 | |
Canonical Apport | =2.20.9-0ubuntu7.21 | |
Canonical Apport | =2.20.9-0ubuntu7.23 | |
Canonical Apport | =2.20.9-0ubuntu7.24 | |
All of | ||
Canonical Ubuntu Linux | =20.04 | |
Any of | ||
Canonical Apport | =2.20.11-0ubuntu8 | |
Canonical Apport | =2.20.11-0ubuntu9 | |
Canonical Apport | =2.20.11-0ubuntu10 | |
Canonical Apport | =2.20.11-0ubuntu11 | |
Canonical Apport | =2.20.11-0ubuntu12 | |
Canonical Apport | =2.20.11-0ubuntu13 | |
Canonical Apport | =2.20.11-0ubuntu14 | |
Canonical Apport | =2.20.11-0ubuntu15 | |
Canonical Apport | =2.20.11-0ubuntu16 | |
Canonical Apport | =2.20.11-0ubuntu17 | |
Canonical Apport | =2.20.11-0ubuntu18 | |
Canonical Apport | =2.20.11-0ubuntu19 | |
Canonical Apport | =2.20.11-0ubuntu20 | |
Canonical Apport | =2.20.11-0ubuntu21 | |
Canonical Apport | =2.20.11-0ubuntu22 | |
Canonical Apport | =2.20.11-0ubuntu23 | |
Canonical Apport | =2.20.11-0ubuntu24 | |
Canonical Apport | =2.20.11-0ubuntu25 | |
Canonical Apport | =2.20.11-0ubuntu26 | |
Canonical Apport | =2.20.11-0ubuntu27 | |
Canonical Apport | =2.20.11-0ubuntu27.2 | |
Canonical Apport | =2.20.11-0ubuntu27.3 | |
Canonical Apport | =2.20.11-0ubuntu27.4 | |
Canonical Apport | =2.20.11-0ubuntu27.5 | |
Canonical Apport | =2.20.11-0ubuntu27.6 | |
Canonical Apport | =2.20.11-0ubuntu27.7 | |
Canonical Apport | =2.20.11-0ubuntu27.8 | |
Canonical Apport | =2.20.11-0ubuntu27.9 | |
Canonical Apport | =2.20.11-0ubuntu27.10 | |
Canonical Apport | =2.20.11-0ubuntu27.11 | |
Canonical Apport | =2.20.11-0ubuntu27.12 | |
Canonical Apport | =2.20.11-0ubuntu27.13 | |
Canonical Apport | =2.20.11-0ubuntu27.14 | |
Canonical Apport | =2.20.11-0ubuntu27.16 | |
Canonical Apport | =2.20.11-0ubuntu27.17 | |
Canonical Apport | =2.20.11-0ubuntu27.18 | |
All of | ||
Canonical Ubuntu Linux | =21.04 | |
Any of | ||
Canonical Apport | =2.20.11-0ubuntu28 | |
Canonical Apport | =2.20.11-0ubuntu29 | |
Canonical Apport | =2.20.11-0ubuntu30 | |
Canonical Apport | =2.20.11-0ubuntu31 | |
Canonical Apport | =2.20.11-0ubuntu32 | |
Canonical Apport | =2.20.11-0ubuntu33 | |
Canonical Apport | =2.20.11-0ubuntu34 | |
Canonical Apport | =2.20.11-0ubuntu35 | |
Canonical Apport | =2.20.11-0ubuntu36 | |
Canonical Apport | =2.20.11-0ubuntu37 | |
Canonical Apport | =2.20.11-0ubuntu38 | |
Canonical Apport | =2.20.11-0ubuntu39 | |
Canonical Apport | =2.20.11-0ubuntu40 | |
Canonical Apport | =2.20.11-0ubuntu41 | |
Canonical Apport | =2.20.11-0ubuntu42 | |
Canonical Apport | =2.20.11-0ubuntu43 | |
Canonical Apport | =2.20.11-0ubuntu44 | |
Canonical Apport | =2.20.11-0ubuntu45 | |
Canonical Apport | =2.20.11-0ubuntu46 | |
Canonical Apport | =2.20.11-0ubuntu47 | |
Canonical Apport | =2.20.11-0ubuntu48 | |
Canonical Apport | =2.20.11-0ubuntu49 | |
Canonical Apport | =2.20.11-0ubuntu50 | |
Canonical Apport | =2.20.11-0ubuntu50.1 | |
Canonical Apport | =2.20.11-0ubuntu50.2 | |
Canonical Apport | =2.20.11-0ubuntu50.3 | |
Canonical Apport | =2.20.11-0ubuntu50.5 | |
Canonical Apport | =2.20.11-0ubuntu50.7 | |
Canonical Apport | =2.20.11-0ubuntu51 | |
Canonical Apport | =2.20.11-0ubuntu52 | |
Canonical Apport | =2.20.11-0ubuntu53 | |
Canonical Apport | =2.20.11-0ubuntu54 | |
Canonical Apport | =2.20.11-0ubuntu55 | |
Canonical Apport | =2.20.11-0ubuntu56 | |
Canonical Apport | =2.20.11-0ubuntu57 | |
Canonical Apport | =2.20.11-0ubuntu58 | |
Canonical Apport | =2.20.11-0ubuntu59 | |
Canonical Apport | =2.20.11-0ubuntu60 | |
Canonical Apport | =2.20.11-0ubuntu61 | |
Canonical Apport | =2.20.11-0ubuntu62 | |
Canonical Apport | =2.20.11-0ubuntu63 | |
Canonical Apport | =2.20.11-0ubuntu64 | |
Canonical Apport | =2.20.11-0ubuntu65 | |
Canonical Apport | =2.20.11-0ubuntu65.1 |
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The severity of CVE-2021-3709 is rated as medium with a CVSS score of 5.5.
You can fix the CVE-2021-3709 vulnerability in the apport package by updating to version 2.20.11-0ubuntu69 if you are on 'impish' or 'jammy' release, version 2.20.9-0ubuntu7.26 if you are on 'bionic' release, version 2.20.11-0ubuntu27.20 if you are on 'focal' release, version 2.20.11-0ubuntu65.3 if you are on 'hirsute' release, or version 2.14.1-0ubuntu3.29+ if you are on 'trusty' release, version 2.20.1-0ubuntu2.30+ if you are on 'xenial' release.
The apport package versions affected by CVE-2021-3709 include 2.14.1-0ubuntu1 to 2.14.1-0ubuntu3.29, 2.20.1-0ubuntu1 to 2.20.1-0ubuntu2.30, and 2.20.9-0ubuntu1 to 2.20.9-0ubuntu7.