USN-4980-1

Kevin Backhouse discovered that polkit incorrectly handled errors in the polkit_system_bus_name_get_creds_sync function. A local attacker could possibly use this issue to escalate privileges.

References

Affected packages

Ubuntu:20.04:LTS / policykit-1

Package

Name: policykit-1
Purl: pkg:deb/ubuntu/policykit-1@0.105-26ubuntu1.1?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.105-26ubuntu1.1

Affected versions

0.*

0.105-26ubuntu1

Ecosystem specific

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "gir1.2-polkit-1.0",
            "binary_version":  "0.105-26ubuntu1.1"
        },
        {
            "binary_name":  "libpolkit-agent-1-0",
            "binary_version":  "0.105-26ubuntu1.1"
        },
        {
            "binary_name":  "libpolkit-gobject-1-0",
            "binary_version":  "0.105-26ubuntu1.1"
        },
        {
            "binary_name":  "policykit-1",
            "binary_version":  "0.105-26ubuntu1.1"
        }
    ]
}

Database specific

cves_map

{
    "cves":  [
        {
            "id":  "CVE-2021-3560",
            "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:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:20.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4980-1.json"