CVE-2023-46847
High
High exploit probability or critical severity with a known exploit.
CVSS base
8.6
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
EPSS — probability of exploitation (30 days)
88.4%
99.8th percentile
CISA KEV
Not listed
Weakness / dates
CWE-120
Published 2023-11-03 · modified 2026-08-07
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | L | Low |
| Integrity | L | Low |
| Availability | H | High |
Timeline
- 2023-11-03 — Published (NVD)
- 2026-08-07 — Last modified (NVD)
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.
Affected
References
- https://access.redhat.com/errata/RHSA-2023:6266
- https://access.redhat.com/errata/RHSA-2023:6267
- https://access.redhat.com/errata/RHSA-2023:6268
- https://access.redhat.com/errata/RHSA-2023:6748
- https://access.redhat.com/errata/RHSA-2023:6801
- https://access.redhat.com/errata/RHSA-2023:6803
- https://access.redhat.com/errata/RHSA-2023:6804
- https://access.redhat.com/errata/RHSA-2023:6805
- https://access.redhat.com/errata/RHSA-2023:6810
- https://access.redhat.com/errata/RHSA-2023:6882
- https://access.redhat.com/errata/RHSA-2023:6884
- https://access.redhat.com/errata/RHSA-2023:7213
- https://access.redhat.com/errata/RHSA-2023:7576
- https://access.redhat.com/errata/RHSA-2023:7578
- https://access.redhat.com/security/cve/CVE-2023-46847
- https://bugzilla.redhat.com/show_bug.cgi?id=2245916
- https://github.com/squid-cache/squid/security/advisories/GHSA-phqj-m8gv-cq4g
- https://access.redhat.com/errata/RHSA-2023:6266
- https://access.redhat.com/errata/RHSA-2023:6267
- https://access.redhat.com/errata/RHSA-2023:6268
- https://access.redhat.com/errata/RHSA-2023:6748
- https://access.redhat.com/errata/RHSA-2023:6801
- https://access.redhat.com/errata/RHSA-2023:6803
- https://access.redhat.com/errata/RHSA-2023:6804
- https://access.redhat.com/errata/RHSA-2023:6805
- https://access.redhat.com/errata/RHSA-2023:6810
- https://access.redhat.com/errata/RHSA-2023:6882
- https://access.redhat.com/errata/RHSA-2023:6884
- https://access.redhat.com/errata/RHSA-2023:7213
- https://access.redhat.com/errata/RHSA-2023:7576