CVE-2023-46847

Squid: denial of service in http digest authentication

Description

Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest Authentication.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
EPSS 51.04% Top 5%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory github.com
Affected: Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support
Affected: Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7.6 Advanced Update Support(Disable again in 2026 - SPRHEL-7118)
Affected: Red Hat Red Hat Enterprise Linux 7.7 Advanced Update Support
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2023:6266 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6267 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6268 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6748 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6801 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6803 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6804 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6805 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6810 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6882 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:6884 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:7213 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:7576 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2023:7578 vendor advisory third party advisory
https://access.redhat.com/security/cve/CVE-2023-46847 vdb entry third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2245916 third party advisory issue tracking
https://github.com/squid-cache/squid/security/advisories/GHSA-phqj-m8gv-cq4g vendor advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html
https://security.netapp.com/advisory/ntap-20231130-0002/

Frequently Asked Questions

What is the severity of CVE-2023-46847?
CVE-2023-46847 has been scored as a high severity vulnerability.
How to fix CVE-2023-46847?
To fix CVE-2023-46847, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-46847 being actively exploited in the wild?
It is possible that CVE-2023-46847 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~51% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-46847?
CVE-2023-46847 affects Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support, Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7.6 Advanced Update Support(Disable again in 2026 - SPRHEL-7118), Red Hat Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.