Vulnerability in Squid-Cache Squid
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 · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.052 (92.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.052 · newest: 0.052 · change: 0.000
Affected products
- Squid-Cache Squid
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 8090020231130092412.a75119d5
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 8020020240122164331.4cda2c84
- Red Hat Enterprise Linux 8.2 Telecommunications Update Service — versions 8020020240122164331.4cda2c84
- Red Hat Enterprise Linux 8.2 Update Services For SAP Solutions — versions 8020020240122164331.4cda2c84
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 8040020240122165847.522a0ee4
- Red Hat Enterprise Linux 8.4 Telecommunications Update Service — versions 8040020240122165847.522a0ee4
- Red Hat Enterprise Linux 8.4 Update Services For SAP Solutions — versions 8040020240122165847.522a0ee4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2023:7465 (vendor-advisory)
- access.redhat.com/errata/RHSA-2023:7668 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0072 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0397 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0771 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0772 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0773 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1153 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2023-5824 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
Frequently asked questions
- What is CVE-2023-5824?
- CVE-2023-5824 is a high-severity vulnerability in Squid-Cache Squid, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2023-11-03.
- How severe is CVE-2023-5824?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-5824 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.