USN-4516-1

It was discovered that GnuPG signatures could be forged when the SHA-1 algorithm is being used. This update removes validating signatures based on SHA-1 that were generated after 2019-01-19. In environments where this is still required, a new option --allow-weak-key-signatures can be used to revert this behaviour.

References

Affected packages

Ubuntu:18.04:LTS / gnupg2

Package

Name: gnupg2
Purl: pkg:deb/ubuntu/gnupg2@2.2.4-1ubuntu1.3?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.2.4-1ubuntu1.3

Affected versions

2.*

2.1.15-1ubuntu8

2.2.4-1ubuntu1

2.2.4-1ubuntu1.1

2.2.4-1ubuntu1.2

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "dirmngr"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gnupg"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gnupg-agent"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gnupg-l10n"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gnupg-utils"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gnupg2"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpg"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpg-agent"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpg-wks-client"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpg-wks-server"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpgconf"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpgsm"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpgv"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpgv-static"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpgv-win32"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "gpgv2"
        },
        {
            "binary_version": "2.2.4-1ubuntu1.3",
            "binary_name": "scdaemon"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4516-1.json"

cves_map

{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2019-14855"
        }
    ],
    "ecosystem": "Ubuntu:18.04:LTS"
}