USN-6727-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-6727-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6727-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-6727-1
Upstream
Related
Published
2024-04-10T13:40:08.464696Z
Modified
2025-10-13T04:36:55Z
Summary
nss vulnerabilities
Details

It was discovered that NSS incorrectly handled padding when checking PKCS#1 certificates. A remote attacker could possibly use this issue to perform Bleichenbacher-like attacks and recover private data. This issue only affected Ubuntu 20.04 LTS. (CVE-2023-4421)

It was discovered that NSS had a timing side-channel when performing RSA decryption. A remote attacker could possibly use this issue to recover private data. (CVE-2023-5388)

It was discovered that NSS had a timing side-channel when using certain NIST curves. A remote attacker could possibly use this issue to recover private data. (CVE-2023-6135)

The NSS package contained outdated CA certificates. This update refreshes the NSS package to version 3.98 which includes the latest CA certificate bundle and other security improvements.

References

Affected packages

Ubuntu:20.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.98-0ubuntu0.20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.98-0ubuntu0.20.04.1

Affected versions

2:3.*

2:3.45-1ubuntu2
2:3.47-1ubuntu1
2:3.47-1ubuntu2
2:3.48-1ubuntu1
2:3.49.1-1ubuntu1
2:3.49.1-1ubuntu1.1
2:3.49.1-1ubuntu1.2
2:3.49.1-1ubuntu1.4
2:3.49.1-1ubuntu1.5
2:3.49.1-1ubuntu1.6
2:3.49.1-1ubuntu1.7
2:3.49.1-1ubuntu1.8
2:3.49.1-1ubuntu1.9

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2:3.98-0ubuntu0.20.04.1",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.98-0ubuntu0.20.04.1",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.98-0ubuntu0.20.04.1",
            "binary_name": "libnss3-tools"
        }
    ]
}

Database specific 

{
    "cves_map": {
        "cves": [
            {
                "id": "CVE-2023-4421",
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ]
            },
            {
                "id": "CVE-2023-5388",
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ]
            },
            {
                "id": "CVE-2023-6135",
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ]
            }
        ],
        "ecosystem": "Ubuntu:20.04:LTS"
    }
}

Ubuntu:22.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.98-0ubuntu0.22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.98-0ubuntu0.22.04.1

Affected versions

2:3.*

2:3.68-1ubuntu1
2:3.68-1ubuntu2
2:3.68.2-0ubuntu1
2:3.68.2-0ubuntu1.1
2:3.68.2-0ubuntu1.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2:3.98-0ubuntu0.22.04.1",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.98-0ubuntu0.22.04.1",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.98-0ubuntu0.22.04.1",
            "binary_name": "libnss3-tools"
        }
    ]
}

Database specific 

{
    "cves_map": {
        "cves": [
            {
                "id": "CVE-2023-5388",
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ]
            },
            {
                "id": "CVE-2023-6135",
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ]
            }
        ],
        "ecosystem": "Ubuntu:22.04:LTS"
    }
}