CVE-2021-28683

    Dashboard / Vulnerabilities / CVE-2021-28683

    CVE-2021-28683

    Published: 20 May 2021Last Modified: 7 Aug 2026

    Summary:

    Details: An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received.

    References: https://blog.envoyproxy.io, https://github.com/envoyproxy/envoy/releases, https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg, https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- e98e41a8e168af7acae8079fc0cd68155f699aa3
    Fixed -None

    Affected versions

    1.16.2

    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
    CVE-2021-28683 | CVE-DB