How severe is CVE-2021-3709?

CVE-2021-3709 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-3709 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3709?

CVE-2021-3709 primarily affects Canonical Apport. In total, 170 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3709?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3709 published?

CVE-2021-3709 was published on 2021-10-01 and last updated on 2026-06-17.

CVE-2021-3709

CVE-2021-3709 is a medium-severity vulnerability in Canonical Apport with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Canonical Apport
Published: 2021-10-01
Last modified: 2026-06-17

Description

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;

Frequently asked questions

What is CVE-2021-3709?: 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;
How severe is CVE-2021-3709?: CVE-2021-3709 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-3709 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3709?: CVE-2021-3709 primarily affects Canonical Apport. In total, 170 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3709?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3709 published?: CVE-2021-3709 was published on 2021-10-01 and last updated on 2026-06-17.

References

Affected products (170)

cpe:2.3:a:canonical:apport:2.14.1-0ubuntu1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.5:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.6:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.7:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.8:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.9:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.10:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.11:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.12:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.13:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.14:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.15:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.16:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.17:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.18:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.19:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.20:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.21:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.23:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.24:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.25:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.27:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.28:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.29:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.14.1-0ubuntu3.29\+esm7:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu2.1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu2.2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu2.4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu2.5:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu2.6:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu2.7:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.1-0ubuntu2.8:*:*:*:*:*:*:*

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