CVE-2019-12499
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the...
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
8.1
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.
- Record
CVE-2019-12499- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Updated
- 2026-11-02
CVE List No score
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.
- Record
CVE-2019-12499- Updated
- 2026-11-02
EUVDEUVD-2019-4094 No score
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.
- Record
EUVD-2019-4094- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-933r-r67f-x632
8.1
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the...
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.
- Record
GHSA-933r-r67f-x632- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSV
8.1
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.
- Record
CVE-2019-12499- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2019-12499
8.1
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.
- Record
DEBIAN-CVE-2019-12499- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-12499
8.1
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.
- Record
UBUNTU-CVE-2019-12499- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVMGASA-2020-0115 No score
Updated firejail packages fix security vulnerabilities
Updated firejail package fixes security vulnerabilities:
Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command) (CVE-2019-12499).
In Firejail before 0.9.60, seccomp filters are writable inside the jail, leading to a lack of intended seccomp restrictions for a process that is joined to the jail after a filter has been modified by an attacker (CVE-2019-12589).
- Record
MGASA-2020-0115- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
firejailDebian:12 |
before 0.9.58.2-2 | 0.9.58.2-2 |
firejailDebian:13 |
before 0.9.58.2-2 | 0.9.58.2-2 |
firejailDebian:14 |
before 0.9.58.2-2 | 0.9.58.2-2 |
firejailMageia:7 From an advisory covering 2 CVEs |
before 0.9.56-2.1.mga7 | 0.9.56-2.1.mga7 |
firejailUbuntu:16.04:LTS |
All versions, plus listed versions 0.9.28-10.9.32-10.9.34-10.9.36-10.9.38-10.9.38-1ubuntu0.10.9.38.10-0ubuntu0.16.04.1 |
None known |
firejailUbuntu:18.04:LTS |
All versions, plus listed versions 0.9.50-30.9.52-10.9.52-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-12499 is a high vulnerability (CVSS 8.1) in Firejail Project Firejail, published May 31, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.02%, the 81st percentile. Fixed in firejail 0.9.58.2-2.
References
github.com/netblue30/firejail/issues/2401
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CDY7B73YDRBURA25APSHD5PFEO4TNSFW
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGVULJ6IKVDO6UAVIQRHQVSKOUD6QDWM
nvd.nist.gov/vuln/detail/CVE-2019-12499
lists.fedoraproject.org/archives/list/[email protected]/message/CDY7B73YDRBURA25APSHD5PFEO4TNSFW
lists.fedoraproject.org/archives/list/[email protected]/message/RGVULJ6IKVDO6UAVIQRHQVSKOUD6QDWM
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github.com/advisories/GHSA-933r-r67f-x632
security-tracker.debian.org/tracker/CVE-2019-12499
advisories.mageia.org/MGASA-2020-0115.html
bugs.mageia.org/show_bug.cgi?id=26013
lists.fedoraproject.org/archives/list/[email protected]/thread/RGVULJ6IKVDO6UAVIQRHQVSKOUD6QDWM
ubuntu.com/security/CVE-2019-12499
cve.org/CVERecord?id=CVE-2019-12499