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CVE-2021-3709

Apport file permission bypass through emacs byte compilation errors

6.5 MediumFix available

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;

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.46%Down 0.6 points since Oct 1, 2021
90%50%10%1%

What each source reports

CVE List Score used 6.5

Apport file permission bypass through emacs byte compilation errors

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;

Record
CVE-2021-3709
CVSS 3.1
6.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-538
Updated
2026-11-02
EUVDEUVD-2021-26992 6.5

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;

Record
EUVD-2021-26992
CVSS 3.1
6.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-hq94-g33h-jj2x 5.5

Function check_attachment_for_errors() in file data/general-hooks/ubuntu.py could be tricked into...

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;

Record
GHSA-hq94-g33h-jj2x
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-22, CWE-668
Updated
2026-11-02
NVD 6.5

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;

Record
CVE-2021-3709
CVSS 3.1
6.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-538, CWE-22
Updated
2026-11-02
OSVUBUNTU-CVE-2021-3709 5.5

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;

Record
UBUNTU-CVE-2021-3709
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-02
OSVUSN-5077-1 No score

apport vulnerabilities

Maik Münch and Stephen Röttger discovered that Apport incorrectly handled certain information gathering operations. A local attacker could use this issue to gain read access to arbitrary files, possibly containing sensitive information.

Record
USN-5077-1
Updated
2026-11-02
OSVUSN-5077-2 No score

apport vulnerabilities

USN-5077-1 fixed several vulnerabilities in Apport. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Maik Münch and Stephen Röttger discovered that Apport incorrectly handled certain information gathering operations. A local attacker could use this issue to gain read access to arbitrary files, possibly containing sensitive information.

Record
USN-5077-2
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
apport
Ubuntu:Pro:14.04:LTS
 before 2.14.1-0ubuntu3.29+esm8, plus listed versions
2.12.5-0ubuntu22.12.6-0ubuntu12.12.7-0ubuntu12.12.7-0ubuntu22.12.7-0ubuntu3
Show 44 moreShow less
2.12.7-0ubuntu62.13.1-0ubuntu12.13.1-0ubuntu22.13.2-0ubuntu22.13.2-0ubuntu32.13.2-0ubuntu42.13.2-0ubuntu52.13.3-0ubuntu12.14-0ubuntu12.14.1-0ubuntu12.14.1-0ubuntu22.14.1-0ubuntu32.14.1-0ubuntu3.12.14.1-0ubuntu3.22.14.1-0ubuntu3.32.14.1-0ubuntu3.42.14.1-0ubuntu3.52.14.1-0ubuntu3.62.14.1-0ubuntu3.72.14.1-0ubuntu3.82.14.1-0ubuntu3.92.14.1-0ubuntu3.102.14.1-0ubuntu3.112.14.1-0ubuntu3.122.14.1-0ubuntu3.132.14.1-0ubuntu3.152.14.1-0ubuntu3.162.14.1-0ubuntu3.182.14.1-0ubuntu3.192.14.1-0ubuntu3.202.14.1-0ubuntu3.212.14.1-0ubuntu3.232.14.1-0ubuntu3.242.14.1-0ubuntu3.252.14.1-0ubuntu3.272.14.1-0ubuntu3.282.14.1-0ubuntu3.292.14.1-0ubuntu3.29+esm12.14.1-0ubuntu3.29+esm22.14.1-0ubuntu3.29+esm32.14.1-0ubuntu3.29+esm42.14.1-0ubuntu3.29+esm52.14.1-0ubuntu3.29+esm62.14.1-0ubuntu3.29+esm7
2.14.1-0ubuntu3.29+esm8
apport
Ubuntu:Pro:16.04:LTS
 before 2.20.1-0ubuntu2.30+esm2, plus listed versions
2.19.1-0ubuntu32.19.2-0ubuntu12.19.2-0ubuntu22.19.2-0ubuntu32.19.2-0ubuntu4
Show 39 moreShow less
2.19.2-0ubuntu52.19.2-0ubuntu62.19.2-0ubuntu82.19.2-0ubuntu92.19.3-0ubuntu12.19.3-0ubuntu22.19.3-0ubuntu32.19.4-0ubuntu12.19.4-0ubuntu22.20-0ubuntu22.20-0ubuntu32.20.1-0ubuntu12.20.1-0ubuntu22.20.1-0ubuntu2.12.20.1-0ubuntu2.22.20.1-0ubuntu2.42.20.1-0ubuntu2.52.20.1-0ubuntu2.62.20.1-0ubuntu2.92.20.1-0ubuntu2.102.20.1-0ubuntu2.122.20.1-0ubuntu2.132.20.1-0ubuntu2.142.20.1-0ubuntu2.152.20.1-0ubuntu2.162.20.1-0ubuntu2.172.20.1-0ubuntu2.182.20.1-0ubuntu2.192.20.1-0ubuntu2.202.20.1-0ubuntu2.212.20.1-0ubuntu2.222.20.1-0ubuntu2.232.20.1-0ubuntu2.242.20.1-0ubuntu2.252.20.1-0ubuntu2.262.20.1-0ubuntu2.272.20.1-0ubuntu2.282.20.1-0ubuntu2.302.20.1-0ubuntu2.30+esm1
2.20.1-0ubuntu2.30+esm2
apport
Ubuntu:18.04:LTS
 before 2.20.9-0ubuntu7.26, plus listed versions
2.20.7-0ubuntu32.20.7-0ubuntu3.12.20.7-0ubuntu42.20.8-0ubuntu12.20.8-0ubuntu2
Show 36 moreShow less
2.20.8-0ubuntu32.20.8-0ubuntu42.20.8-0ubuntu52.20.8-0ubuntu62.20.8-0ubuntu72.20.8-0ubuntu82.20.8-0ubuntu92.20.8-0ubuntu102.20.9-0ubuntu12.20.9-0ubuntu22.20.9-0ubuntu42.20.9-0ubuntu52.20.9-0ubuntu62.20.9-0ubuntu72.20.9-0ubuntu7.12.20.9-0ubuntu7.22.20.9-0ubuntu7.32.20.9-0ubuntu7.42.20.9-0ubuntu7.52.20.9-0ubuntu7.62.20.9-0ubuntu7.72.20.9-0ubuntu7.82.20.9-0ubuntu7.92.20.9-0ubuntu7.112.20.9-0ubuntu7.122.20.9-0ubuntu7.132.20.9-0ubuntu7.142.20.9-0ubuntu7.152.20.9-0ubuntu7.162.20.9-0ubuntu7.172.20.9-0ubuntu7.182.20.9-0ubuntu7.192.20.9-0ubuntu7.202.20.9-0ubuntu7.212.20.9-0ubuntu7.232.20.9-0ubuntu7.24
2.20.9-0ubuntu7.26
apport
Ubuntu:20.04:LTS
 before 2.20.11-0ubuntu27.20, plus listed versions
2.20.11-0ubuntu82.20.11-0ubuntu92.20.11-0ubuntu132.20.11-0ubuntu142.20.11-0ubuntu15
Show 25 moreShow less
2.20.11-0ubuntu162.20.11-0ubuntu172.20.11-0ubuntu182.20.11-0ubuntu192.20.11-0ubuntu202.20.11-0ubuntu212.20.11-0ubuntu222.20.11-0ubuntu242.20.11-0ubuntu252.20.11-0ubuntu262.20.11-0ubuntu272.20.11-0ubuntu27.22.20.11-0ubuntu27.32.20.11-0ubuntu27.42.20.11-0ubuntu27.62.20.11-0ubuntu27.82.20.11-0ubuntu27.92.20.11-0ubuntu27.102.20.11-0ubuntu27.112.20.11-0ubuntu27.122.20.11-0ubuntu27.132.20.11-0ubuntu27.142.20.11-0ubuntu27.162.20.11-0ubuntu27.172.20.11-0ubuntu27.18
2.20.11-0ubuntu27.20
apport
Ubuntu:18.04:LTS
From an advisory covering 2 CVEs
 before 2.20.9-0ubuntu7.26, plus listed versions
2.20.7-0ubuntu32.20.7-0ubuntu3.12.20.7-0ubuntu42.20.8-0ubuntu12.20.8-0ubuntu2
Show 36 moreShow less
2.20.8-0ubuntu32.20.8-0ubuntu42.20.8-0ubuntu52.20.8-0ubuntu62.20.8-0ubuntu72.20.8-0ubuntu82.20.8-0ubuntu92.20.8-0ubuntu102.20.9-0ubuntu12.20.9-0ubuntu22.20.9-0ubuntu42.20.9-0ubuntu52.20.9-0ubuntu62.20.9-0ubuntu72.20.9-0ubuntu7.12.20.9-0ubuntu7.22.20.9-0ubuntu7.32.20.9-0ubuntu7.42.20.9-0ubuntu7.52.20.9-0ubuntu7.62.20.9-0ubuntu7.72.20.9-0ubuntu7.82.20.9-0ubuntu7.92.20.9-0ubuntu7.112.20.9-0ubuntu7.122.20.9-0ubuntu7.132.20.9-0ubuntu7.142.20.9-0ubuntu7.152.20.9-0ubuntu7.162.20.9-0ubuntu7.172.20.9-0ubuntu7.182.20.9-0ubuntu7.192.20.9-0ubuntu7.202.20.9-0ubuntu7.212.20.9-0ubuntu7.232.20.9-0ubuntu7.24
2.20.9-0ubuntu7.26
apport
Ubuntu:20.04:LTS
From an advisory covering 2 CVEs
 before 2.20.11-0ubuntu27.20, plus listed versions
2.20.11-0ubuntu82.20.11-0ubuntu92.20.11-0ubuntu132.20.11-0ubuntu142.20.11-0ubuntu15
Show 25 moreShow less
2.20.11-0ubuntu162.20.11-0ubuntu172.20.11-0ubuntu182.20.11-0ubuntu192.20.11-0ubuntu202.20.11-0ubuntu212.20.11-0ubuntu222.20.11-0ubuntu242.20.11-0ubuntu252.20.11-0ubuntu262.20.11-0ubuntu272.20.11-0ubuntu27.22.20.11-0ubuntu27.32.20.11-0ubuntu27.42.20.11-0ubuntu27.62.20.11-0ubuntu27.82.20.11-0ubuntu27.92.20.11-0ubuntu27.102.20.11-0ubuntu27.112.20.11-0ubuntu27.122.20.11-0ubuntu27.132.20.11-0ubuntu27.142.20.11-0ubuntu27.162.20.11-0ubuntu27.172.20.11-0ubuntu27.18
2.20.11-0ubuntu27.20
apport
Ubuntu:Pro:14.04:LTS
From an advisory covering 2 CVEs
 before 2.14.1-0ubuntu3.29+esm8, plus listed versions
2.12.5-0ubuntu22.12.6-0ubuntu12.12.7-0ubuntu12.12.7-0ubuntu22.12.7-0ubuntu3
Show 44 moreShow less
2.12.7-0ubuntu62.13.1-0ubuntu12.13.1-0ubuntu22.13.2-0ubuntu22.13.2-0ubuntu32.13.2-0ubuntu42.13.2-0ubuntu52.13.3-0ubuntu12.14-0ubuntu12.14.1-0ubuntu12.14.1-0ubuntu22.14.1-0ubuntu32.14.1-0ubuntu3.12.14.1-0ubuntu3.22.14.1-0ubuntu3.32.14.1-0ubuntu3.42.14.1-0ubuntu3.52.14.1-0ubuntu3.62.14.1-0ubuntu3.72.14.1-0ubuntu3.82.14.1-0ubuntu3.92.14.1-0ubuntu3.102.14.1-0ubuntu3.112.14.1-0ubuntu3.122.14.1-0ubuntu3.132.14.1-0ubuntu3.152.14.1-0ubuntu3.162.14.1-0ubuntu3.182.14.1-0ubuntu3.192.14.1-0ubuntu3.202.14.1-0ubuntu3.212.14.1-0ubuntu3.232.14.1-0ubuntu3.242.14.1-0ubuntu3.252.14.1-0ubuntu3.272.14.1-0ubuntu3.282.14.1-0ubuntu3.292.14.1-0ubuntu3.29+esm12.14.1-0ubuntu3.29+esm22.14.1-0ubuntu3.29+esm32.14.1-0ubuntu3.29+esm42.14.1-0ubuntu3.29+esm52.14.1-0ubuntu3.29+esm62.14.1-0ubuntu3.29+esm7
2.14.1-0ubuntu3.29+esm8
apport
Ubuntu:Pro:16.04:LTS
From an advisory covering 2 CVEs
 before 2.20.1-0ubuntu2.30+esm2, plus listed versions
2.19.1-0ubuntu32.19.2-0ubuntu12.19.2-0ubuntu22.19.2-0ubuntu32.19.2-0ubuntu4
Show 39 moreShow less
2.19.2-0ubuntu52.19.2-0ubuntu62.19.2-0ubuntu82.19.2-0ubuntu92.19.3-0ubuntu12.19.3-0ubuntu22.19.3-0ubuntu32.19.4-0ubuntu12.19.4-0ubuntu22.20-0ubuntu22.20-0ubuntu32.20.1-0ubuntu12.20.1-0ubuntu22.20.1-0ubuntu2.12.20.1-0ubuntu2.22.20.1-0ubuntu2.42.20.1-0ubuntu2.52.20.1-0ubuntu2.62.20.1-0ubuntu2.92.20.1-0ubuntu2.102.20.1-0ubuntu2.122.20.1-0ubuntu2.132.20.1-0ubuntu2.142.20.1-0ubuntu2.152.20.1-0ubuntu2.162.20.1-0ubuntu2.172.20.1-0ubuntu2.182.20.1-0ubuntu2.192.20.1-0ubuntu2.202.20.1-0ubuntu2.212.20.1-0ubuntu2.222.20.1-0ubuntu2.232.20.1-0ubuntu2.242.20.1-0ubuntu2.252.20.1-0ubuntu2.262.20.1-0ubuntu2.272.20.1-0ubuntu2.282.20.1-0ubuntu2.302.20.1-0ubuntu2.30+esm1
2.20.1-0ubuntu2.30+esm2

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-3709 is a medium vulnerability (CVSS 6.5) in Canonical Apport, published September 14, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 40th percentile. Fixed in apport 2.14.1-0ubuntu3.29+esm8.

References

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