CVE & CISA-KEV CatalogNVD
CVE-2023-5824
HIGHEPSS 92th pctl7.5
CVSS v3
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.
How to fix
Remediation Available
squidAmazon
Fixed in:7:6.6-1.amzn2023.0.3
Fixed in:7:6.6-1.amzn2023.0.3
squid-debuginfoAmazon
Fixed in:7:6.6-1.amzn2023.0.3
Fixed in:7:6.6-1.amzn2023.0.3
squid-debugsourceAmazon
Fixed in:7:6.6-1.amzn2023.0.3
Fixed in:7:6.6-1.amzn2023.0.3
squidDebian
libecapRed Hat / RHEL
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.src::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.x86_64::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.s390x::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.ppc64le::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.aarch64::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0397
libecapRocky
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.aarch64::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.src::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0773
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0773
libecap-debuginfoRed Hat / RHEL
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0773
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.s390x::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.ppc64le::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.aarch64::squid:4RHSA-2023:7668
libecap-debuginfoRocky
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.s390x::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0772
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.ppc64le::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4RHSA-2024:0397
libecap-debugsourceRocky
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.ppc64le::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.s390x::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.aarch64::squid:4RHSA-2023:7668
libecap-debugsourceRed Hat / RHEL
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.ppc64le::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0773
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0772
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.aarch64::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.x86_64::squid:4RHSA-2023:7668
libecap-develRed Hat / RHEL
Fixed in:0:1.0.1-2.module+el8.9.0+19703+a1da7223.s390x::squid:4RHSA-2023:7668
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4RHSA-2024:0771
libecap-develRocky
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0397
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4RHSA-2024:0771
Fixed in:0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4RHSA-2024:0771
squidRed Hat / RHEL
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.aarch64::squid:4RHSA-2023:7668
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.src::squid:4RHSA-2023:7668
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.src::squid:4RHSA-2024:0397
Fixed in:7:4.4-8.module+el8.2.0+21173+22259b09.7.x86_64::squid:4RHSA-2024:0772
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.x86_64::squid:4RHSA-2024:0771
Fixed in:7:4.4-8.module+el8.2.0+21173+22259b09.7.ppc64le::squid:4RHSA-2024:0772
Fixed in:7:4.11-4.module+el8.4.0+21174+3894a031.6.src::squid:4RHSA-2024:0773
Fixed in:7:4.11-4.module+el8.4.0+21174+3894a031.6.x86_64::squid:4RHSA-2024:0773
squidRocky
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.ppc64le::squid:4RHSA-2024:0771
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.s390x::squid:4RHSA-2024:0771
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.aarch64::squid:4RHSA-2024:0771
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.x86_64::squid:4RHSA-2024:0397
Fixed in:7:4.4-8.module+el8.2.0+21173+22259b09.7.src::squid:4RHSA-2024:0772
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.ppc64le::squid:4RHSA-2023:7668
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.s390x::squid:4RHSA-2024:0397
Fixed in:7:4.4-8.module+el8.2.0+21173+22259b09.7.x86_64::squid:4RHSA-2024:0772
squid-debuginfoRocky
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.s390x::squid:4RHSA-2024:0397
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.s390x::squid:4RHSA-2024:0771
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.x86_64::squid:4RHSA-2023:7668
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.s390x::squid:4RHSA-2023:7668
Fixed in:7:4.4-8.module+el8.2.0+21173+22259b09.7.x86_64::squid:4RHSA-2024:0772
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.ppc64le::squid:4RHSA-2023:7668
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.aarch64::squid:4RHSA-2024:0397
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.x86_64::squid:4RHSA-2024:0397
squid-debuginfoRed Hat / RHEL
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.s390x::squid:4RHSA-2023:7668
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.x86_64::squid:4RHSA-2024:0771
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.aarch64::squid:4RHSA-2024:0771
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.ppc64le::squid:4RHSA-2024:0771
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.x86_64::squid:4RHSA-2024:0397
Fixed in:7:4.11-4.module+el8.4.0+21174+3894a031.6.x86_64::squid:4RHSA-2024:0773
Fixed in:7:4.4-8.module+el8.2.0+21173+22259b09.7.x86_64::squid:4RHSA-2024:0772
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.ppc64le::squid:4RHSA-2023:7668
squid-debugsourceRed Hat / RHEL
Fixed in:7:4.4-8.module+el8.2.0+21173+22259b09.7.ppc64le::squid:4RHSA-2024:0772
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.ppc64le::squid:4RHSA-2023:7668
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.ppc64le::squid:4RHSA-2024:0771
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.s390x::squid:4RHSA-2023:7668
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.aarch64::squid:4RHSA-2024:0397
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.aarch64::squid:4RHSA-2024:0771
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.ppc64le::squid:4RHSA-2024:0397
Fixed in:7:4.11-4.module+el8.4.0+21174+3894a031.6.ppc64le::squid:4RHSA-2024:0773
squid-debugsourceRocky
Fixed in:7:4.15-3.module+el8.6.0+21069+a1561e3d.4.x86_64::squid:4RHSA-2024:0771
Fixed in:7:4.11-4.module+el8.4.0+21174+3894a031.6.ppc64le::squid:4RHSA-2024:0773
Fixed in:7:4.11-4.module+el8.4.0+21174+3894a031.6.x86_64::squid:4RHSA-2024:0773
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.s390x::squid:4RHSA-2023:7668
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.ppc64le::squid:4RHSA-2023:7668
Fixed in:7:4.15-6.module+el8.8.0+21068+0ecbc070.3.aarch64::squid:4RHSA-2024:0397
Fixed in:7:4.4-8.module+el8.2.0+21173+22259b09.7.ppc64le::squid:4RHSA-2024:0772
Fixed in:7:4.15-7.module+el8.9.0+20806+014d88aa.3.aarch64::squid:4RHSA-2023:7668
squidUbuntu
Fixed in:4.10-1ubuntu1.10USN-6728-1
This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.
Fixed in:4.10-1ubuntu1.12USN-6728-3
This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.
Fixed in:5.7-0ubuntu0.22.04.4USN-6728-1
This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
5.19%probability of exploitation in 30 days
92ndpercentile
High risk: more likely to be exploited than 92% of all known CVEs.
References
Vendor Advisory1
Third-Party Advisory1
Issue Tracking1
Related Vulnerabilities
Other CWE-755 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2017-5638 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
| CVE-2020-7247 | Critical | 9.8 | 99% | KEV | Fix |
| CVE-2023-36933 | High | 7.5 | 72% | - | Fix |
| CVE-2018-0934 | High | 7.5 | 66% | - | Fix |
| CVE-2019-14287 | High | 8.8 | 64% | - | Fix |
| CVE-2019-12815 | Critical | 9.8 | 58% | - | Fix |
Common questions
How do I fix CVE-2023-5824?
Published advisories record a fix for 19 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2023-5824 being actively exploited?
Not that we know of. CVE-2023-5824 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 5.2% is the estimated probability that it will be exploited in the next 30 days. That is higher than 92% of all scored CVEs.
How severe is CVE-2023-5824?
CVE-2023-5824 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2023-5824 affect?
Published advisories record a fix for squid (Amazon), squid-debuginfo (Amazon), squid-debugsource (Amazon), squid (Debian), and 15 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2023-5824
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.