BIT-envoy-2021-43824

    Dashboard / Vulnerabilities / BIT-envoy-2021-43824

    BIT-envoy-2021-43824

    Published: 6 Mar 2024Last Modified: 8 Sept 2026

    Summary: Null pointer dereference in envoy

    Details: Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.

    References: https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a, https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p, https://nvd.nist.gov/vuln/detail/CVE-2021-43824

    Affected packages

    Package

    Name: envoy

    Purl: pkg:bitnami/envoy

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.18.6

    Affected versions

    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
    BIT-envoy-2021-43824 | CVE-DB