HOMEVULNERABILITIESCVE-2017-5206
CRITICAL

CVE-2017-5206

NVD-CWE-noinfoPublished: March 23, 2017· Updated: Jun 17, 2026

9.0
CVSS v3.1

Official Description

Firejail before 0.9.44.4, when running on a Linux kernel before 4.8, allows context-dependent attackers to bypass a seccomp-based sandbox protection mechanism via the --allow-debuggers argument.

NVD Source

Technical Analysis

CVE-2017-5206 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.0.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeChanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected Vendors & Products

firejail_project1 product(s)
firejail
Linux1 product(s)
linux kernel
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

All References (12)

http://www.openwall.com/lists/oss-security/2017/01/07/5Mailing List · Patch · Third Party Advisory
http://www.securityfocus.com/bid/97120Third Party Advisory · VDB Entry
https://security.gentoo.org/glsa/201701-62Patch · Third Party Advisory · VDB Entry
http://www.openwall.com/lists/oss-security/2017/01/07/5Mailing List · Patch · Third Party Advisory
http://www.securityfocus.com/bid/97120Third Party Advisory · VDB Entry
https://security.gentoo.org/glsa/201701-62Patch · Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2017-5206
CVSS Score9.0 / 10
SeverityCRITICAL
CISA KEVNo
Affected2 vendor(s)
PublishedMar 23, 2017

Related CVEs (NVD-CWE-noinfo)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2017-5206 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.