How severe is CVE-2020-17367?

CVE-2020-17367 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-17367 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-17367?

CVE-2020-17367 primarily affects Firejail Project Firejail. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-17367?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-17367 published?

CVE-2020-17367 was published on 2020-08-11 and last updated on 2026-06-17.

CVE-2020-17367

CVE-2020-17367 is a high-severity vulnerability in Firejail Project Firejail with a CVSS 3.x base score of 7.8. 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-88.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-88
Affected product: Firejail Project Firejail
Published: 2020-08-11
Last modified: 2026-06-17

Description

Firejail through 0.9.62 does not honor the -- end-of-options indicator after the --output option, which may lead to command injection.

Frequently asked questions

What is CVE-2020-17367?: Firejail through 0.9.62 does not honor the -- end-of-options indicator after the --output option, which may lead to command injection.
How severe is CVE-2020-17367?: CVE-2020-17367 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-17367 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-17367?: CVE-2020-17367 primarily affects Firejail Project Firejail. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-17367?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-17367 published?: CVE-2020-17367 was published on 2020-08-11 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:firejail_project:firejail:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

More vulnerabilities in Firejail Project Firejail

CVE-2020-17368 — Critical (CVSS 9.8): Firejail through 0.9.62 mishandles shell metacharacters during use of the --output or --output-stderr option, which may…
CVE-2017-5206 — Critical (CVSS 9.0): Firejail before 0.9.44.4, when running on a Linux kernel before 4.8, allows context-dependent attackers to bypass a…
CVE-2019-12589 — High (CVSS 8.8): In Firejail before 0.9.60, seccomp filters are writable inside the jail, leading to a lack of intended seccomp…
CVE-2017-5940 — High (CVSS 8.8): Firejail before 0.9.44.6 and 0.9.38.x LTS before 0.9.38.10 LTS does not comprehensively address dotfile cases during…
CVE-2017-5180 — High (CVSS 8.8): Firejail before 0.9.44.4 and 0.9.38.x LTS before 0.9.38.8 LTS does not consider the .Xauthority case during its attempt…
CVE-2016-9016 — High (CVSS 8.8): Firejail 0.9.38.4 allows local users to execute arbitrary commands outside of the sandbox via a crafted TIOCSTI ioctl…

All CVEs affecting Firejail Project Firejail →

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