USN-5168-4

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Source
https://ubuntu.com/security/notices/USN-5168-4
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5168-4.json
JSON Data
https://api.osv.dev/v1/vulns/USN-5168-4
Upstream
Related
Published
2021-12-07T19:35:28.149213Z
Modified
2025-10-13T04:35:41Z
Summary
nss regression
Details

USN-5168-3 fixed a vulnerability in NSS. Unfortunately that update introduced a regression that could break SSL connections. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Tavis Ormandy discovered that NSS incorrectly handled verifying DSA/RSA-PSS signatures. A remote attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly execute arbitrary code.

References

Affected packages

Ubuntu:Pro:14.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.14.04.5+esm10?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.28.4-0ubuntu0.14.04.5+esm10

Affected versions

2:3.*

2:3.15.1-1ubuntu1
2:3.15.2-1
2:3.15.3-1
2:3.15.3.1-1
2:3.15.3.1-1.1
2:3.15.3.1-1.1ubuntu1
2:3.15.4-1ubuntu3
2:3.15.4-1ubuntu4
2:3.15.4-1ubuntu5
2:3.15.4-1ubuntu6
2:3.15.4-1ubuntu7
2:3.15.4-1ubuntu7.1
2:3.17-0ubuntu0.14.04.1
2:3.17.1-0ubuntu0.14.04.1
2:3.17.1-0ubuntu0.14.04.2
2:3.17.4-0ubuntu0.14.04.1
2:3.19.2-0ubuntu0.14.04.1
2:3.19.2.1-0ubuntu0.14.04.1
2:3.19.2.1-0ubuntu0.14.04.2
2:3.21-0ubuntu0.14.04.1
2:3.21-0ubuntu0.14.04.2
2:3.23-0ubuntu0.14.04.1
2:3.26.2-0ubuntu0.14.04.3
2:3.28.4-0ubuntu0.14.04.1
2:3.28.4-0ubuntu0.14.04.2
2:3.28.4-0ubuntu0.14.04.3
2:3.28.4-0ubuntu0.14.04.4
2:3.28.4-0ubuntu0.14.04.5
2:3.28.4-0ubuntu0.14.04.5+esm1
2:3.28.4-0ubuntu0.14.04.5+esm2
2:3.28.4-0ubuntu0.14.04.5+esm3
2:3.28.4-0ubuntu0.14.04.5+esm4
2:3.28.4-0ubuntu0.14.04.5+esm5
2:3.28.4-0ubuntu0.14.04.5+esm6
2:3.28.4-0ubuntu0.14.04.5+esm7
2:3.28.4-0ubuntu0.14.04.5+esm8
2:3.28.4-0ubuntu0.14.04.5+esm9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnss3",
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm10"
        },
        {
            "binary_name": "libnss3-1d",
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm10"
        },
        {
            "binary_name": "libnss3-dev",
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm10"
        },
        {
            "binary_name": "libnss3-nssdb",
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm10"
        },
        {
            "binary_name": "libnss3-tools",
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm10"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5168-4.json"

cves_map

{
    "ecosystem": "Ubuntu:Pro:14.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-43527",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ]
}

Ubuntu:Pro:16.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.16.04.14+esm2?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.28.4-0ubuntu0.16.04.14+esm2

Affected versions

2:3.*

2:3.19.2-1ubuntu1
2:3.19.2.1-0ubuntu1
2:3.21-1ubuntu2
2:3.21-1ubuntu3
2:3.21-1ubuntu4
2:3.23-0ubuntu0.16.04.1
2:3.26.2-0ubuntu0.16.04.2
2:3.28.4-0ubuntu0.16.04.1
2:3.28.4-0ubuntu0.16.04.2
2:3.28.4-0ubuntu0.16.04.3
2:3.28.4-0ubuntu0.16.04.4
2:3.28.4-0ubuntu0.16.04.5
2:3.28.4-0ubuntu0.16.04.6
2:3.28.4-0ubuntu0.16.04.8
2:3.28.4-0ubuntu0.16.04.9
2:3.28.4-0ubuntu0.16.04.10
2:3.28.4-0ubuntu0.16.04.11
2:3.28.4-0ubuntu0.16.04.12
2:3.28.4-0ubuntu0.16.04.13
2:3.28.4-0ubuntu0.16.04.14
2:3.28.4-0ubuntu0.16.04.14+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnss3",
            "binary_version": "2:3.28.4-0ubuntu0.16.04.14+esm2"
        },
        {
            "binary_name": "libnss3-1d",
            "binary_version": "2:3.28.4-0ubuntu0.16.04.14+esm2"
        },
        {
            "binary_name": "libnss3-dev",
            "binary_version": "2:3.28.4-0ubuntu0.16.04.14+esm2"
        },
        {
            "binary_name": "libnss3-nssdb",
            "binary_version": "2:3.28.4-0ubuntu0.16.04.14+esm2"
        },
        {
            "binary_name": "libnss3-tools",
            "binary_version": "2:3.28.4-0ubuntu0.16.04.14+esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5168-4.json"

cves_map

{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-43527",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ]
}