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Status published
High
CVE-2023-5824
Squid: dos against http and https
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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
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Affected Vendor
Red Hat
View all reports →Affected Software
Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7
Vulnerable Versions:
8090020231130092412.a75119d5, 8020020240122164331.4cda2c84, 8040020240122165847.522a0ee4, 8060020231222131040.ad008a3a, 8080020231222130009.63b34585, 7:5.5-6.el9_3.2, 7:5.2-1.el9_0.4, 7:5.5-5.el9_2.3
Timeline
Official Publish:
November 3rd, 2023
Last Modified:
November 6th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H