UBUNTU-CVE-2023-4421

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Source
https://ubuntu.com/security/CVE-2023-4421
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-4421.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2023-4421
Upstream
Downstream
Related
Published
2023-12-12T17:15:00Z
Modified
2025-07-18T16:54:08Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The NSS code used for checking PKCS#1 v1.5 was leaking information useful in mounting Bleichenbacher-like attacks. Both the overall correctness of the padding as well as the length of the encrypted message was leaking through timing side-channel. By sending large number of attacker-selected ciphertexts, the attacker would be able to decrypt a previously intercepted PKCS#1 v1.5 ciphertext (for example, to decrypt a TLS session that used RSA key exchange), or forge a signature using the victim's key. The issue was fixed by implementing the implicit rejection algorithm, in which the NSS returns a deterministic random message in case invalid padding is detected, as proposed in the Marvin Attack paper. This vulnerability affects NSS < 3.61.

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+esm12?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

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
2:3.28.4-0ubuntu0.14.04.5+esm10
2:3.28.4-0ubuntu0.14.04.5+esm11
2:3.28.4-0ubuntu0.14.04.5+esm12

Ubuntu:Pro:16.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.16.04.14+esm4?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

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
2:3.28.4-0ubuntu0.16.04.14+esm2
2:3.28.4-0ubuntu0.16.04.14+esm3
2:3.28.4-0ubuntu0.16.04.14+esm4

Ubuntu:Pro:18.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.35-2ubuntu2.16?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:3.*

2:3.32-1ubuntu3
2:3.34-1ubuntu1
2:3.35-2ubuntu2
2:3.35-2ubuntu2.1
2:3.35-2ubuntu2.2
2:3.35-2ubuntu2.3
2:3.35-2ubuntu2.5
2:3.35-2ubuntu2.6
2:3.35-2ubuntu2.7
2:3.35-2ubuntu2.8
2:3.35-2ubuntu2.9
2:3.35-2ubuntu2.11
2:3.35-2ubuntu2.12
2:3.35-2ubuntu2.13
2:3.35-2ubuntu2.14
2:3.35-2ubuntu2.15
2:3.35-2ubuntu2.16

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 

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