USN-5720-1

It was discovered that Zstandard was not properly managing file permissions when generating output files. A local attacker could possibly use this issue to cause a race condition and gain unauthorized access to sensitive data.

References

Affected packages

Ubuntu:Pro:16.04:LTS / libzstd

Package

Name: libzstd
Purl: pkg:deb/ubuntu/libzstd@1.3.1+dfsg-1~ubuntu0.16.04.1+esm3?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.3.1+dfsg-1~ubuntu0.16.04.1+esm3

Affected versions

0.*

0.4.5-1

0.5.1-1

1.*

1.3.1+dfsg-1~ubuntu0.16.04.1

1.3.1+dfsg-1~ubuntu0.16.04.1+esm1

1.3.1+dfsg-1~ubuntu0.16.04.1+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libzstd1",
            "binary_version": "1.3.1+dfsg-1~ubuntu0.16.04.1+esm3"
        },
        {
            "binary_name": "libzstd1-dev",
            "binary_version": "1.3.1+dfsg-1~ubuntu0.16.04.1+esm3"
        },
        {
            "binary_name": "zstd",
            "binary_version": "1.3.1+dfsg-1~ubuntu0.16.04.1+esm3"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-24031",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2021-24032",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}