UBUNTU-CVE-2021-4239

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Source
https://ubuntu.com/security/CVE-2021-4239
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4239.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-4239
Upstream
Published
2022-12-27T22:15:00Z
Modified
2026-01-20T17:16:14.307629Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The Noise protocol implementation suffers from weakened cryptographic security after encrypting 2^64 messages, and a potential denial of service attack. After 2^64 (~18.4 quintillion) messages are encrypted with the Encrypt function, the nonce counter will wrap around, causing multiple messages to be encrypted with the same key and nonce. In a separate issue, the Decrypt function increments the nonce state even when it fails to decrypt a message. If an attacker can provide an invalid input to the Decrypt function, this will cause the nonce state to desynchronize between the peers, resulting in a failure to encrypt all subsequent messages.

References

Affected packages

Ubuntu:22.04:LTS / golang-github-flynn-noise

Package

Name
golang-github-flynn-noise
Purl
pkg:deb/ubuntu/golang-github-flynn-noise@1.0.0-2?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.0.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-flynn-noise-dev",
            "binary_version": "1.0.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4239.json"

Ubuntu:24.04:LTS / golang-github-flynn-noise

Package

Name
golang-github-flynn-noise
Purl
pkg:deb/ubuntu/golang-github-flynn-noise@1.0.0-2?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.0.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-flynn-noise-dev",
            "binary_version": "1.0.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4239.json"

Ubuntu:25.10 / golang-github-flynn-noise

Package

Name
golang-github-flynn-noise
Purl
pkg:deb/ubuntu/golang-github-flynn-noise@1.1.0-1?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.1.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-flynn-noise-dev",
            "binary_version": "1.1.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4239.json"