UBUNTU-CVE-2020-25648

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Source
https://ubuntu.com/security/CVE-2020-25648
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25648.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-25648
Upstream
Downstream
Related
Published
2020-10-20T22:15:00Z
Modified
2025-09-08T16:46:19Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.

References

Affected packages

Ubuntu:18.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.35-2ubuntu2.14?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.35-2ubuntu2.14

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnss3",
            "binary_version": "2:3.35-2ubuntu2.14"
        },
        {
            "binary_name": "libnss3-dev",
            "binary_version": "2:3.35-2ubuntu2.14"
        },
        {
            "binary_name": "libnss3-tools",
            "binary_version": "2:3.35-2ubuntu2.14"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.49.1-1ubuntu1.7?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.49.1-1ubuntu1.7

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnss3",
            "binary_version": "2:3.49.1-1ubuntu1.7"
        },
        {
            "binary_name": "libnss3-dev",
            "binary_version": "2:3.49.1-1ubuntu1.7"
        },
        {
            "binary_name": "libnss3-tools",
            "binary_version": "2:3.49.1-1ubuntu1.7"
        }
    ],
    "availability": "No subscription required"
}