USN-5141-1

Roman Fiedler discovered that a race condition existed in Firejail when using OverlayFS to prevent writes to the underlying file system. A local attacker could use this to gain administrative privileges. Note: this update disables support for OverlayFS in Firejail.

References

Affected packages

Ubuntu:20.04:LTS / firejail

Package

Name: firejail
Purl: pkg:deb/ubuntu/firejail@0.9.62-3ubuntu0.1?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.9.62-3ubuntu0.1

Affected versions

0.*

0.9.60-2

0.9.62-1

0.9.62-2

0.9.62-3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "firejail",
            "binary_version": "0.9.62-3ubuntu0.1"
        },
        {
            "binary_name": "firejail-profiles",
            "binary_version": "0.9.62-3ubuntu0.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-26910",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}