UBUNTU-CVE-2020-25648

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    UBUNTU-CVE-2020-25648

    Published: 20 Oct 2020Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-25648
    Aliases:
    USN-5410-1

    Summary:

    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: https://ubuntu.com/security/CVE-2020-25648, https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.58_release_notes, https://ubuntu.com/security/notices/USN-5410-1, https://www.cve.org/CVERecord?id=CVE-2020-25648

    Affected packages

    Package

    Name: nss

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:3.35-2ubuntu2.14

    Affected versions

    2:3.32-1ubuntu3

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2020-25648 | CVE-DB