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    CVE-2023-5824

    A flaw was found in Squid. The limits applied for validation of HTTP response headers are applied before caching. However, Squid may grow a cached HTTP response header beyond the configured maximum size, causing a stall or crash of the worker process when a large header is retrieved from the disk cache, resulting in a denial of service.

    Published:Oct 19, 2023
    Last Modified:Nov 6, 2025
    EPS:Nov 3, 2023
    EPSS Score:0.01341
    CVSS Score:7.5

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Squid-cache
    Product
    Squid

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://access.redhat.com/errata/RHSA-2023:7465
    https://access.redhat.com/errata/RHSA-2023:7668
    https://access.redhat.com/errata/RHSA-2024:0072
    https://access.redhat.com/errata/RHSA-2024:0397
    https://access.redhat.com/errata/RHSA-2024:0771
    https://access.redhat.com/errata/RHSA-2024:0772
    https://access.redhat.com/errata/RHSA-2024:0773
    https://access.redhat.com/errata/RHSA-2024:1153
    https://access.redhat.com/security/cve/CVE-2023-5824
    https://bugzilla.redhat.com/show_bug.cgi?id=2245914
    https://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255
    https://access.redhat.com/errata/RHSA-2023:7465
    https://access.redhat.com/errata/RHSA-2023:7668
    https://access.redhat.com/errata/RHSA-2024:0072
    https://access.redhat.com/errata/RHSA-2024:0397
    https://access.redhat.com/errata/RHSA-2024:0771
    https://access.redhat.com/errata/RHSA-2024:0772
    https://access.redhat.com/errata/RHSA-2024:0773
    https://access.redhat.com/errata/RHSA-2024:1153
    https://access.redhat.com/security/cve/CVE-2023-5824
    https://bugzilla.redhat.com/show_bug.cgi?id=2245914
    https://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255
    https://lists.debian.org/debian-lts-announce/2025/09/msg00027.html
    https://security.netapp.com/advisory/ntap-20231130-0003/

    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