Vulnerability Intelligence Report
Squid: denial of service in http digest authentication
CVE-2023-46847
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.
Memory Corruption
No Active Exploit Signals
CVSS Base Score
8.6
HIGH
Exploitability:3.9
Impact Score:4.8
EPSS Probability:88.35%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-120 ↗Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| 3.2.0.1 < 6.4 (affected) | ||
| Red Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support | 7:3.4.14-15.el6_10.1 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support | 7:3.1.23-24.el6_10.1 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 7 | 7:3.5.20-17.el7_9.9 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 7.6 Advanced Update Support | 7:3.5.20-12.el7_6.2 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 7.7 Advanced Update Support | 7:3.5.20-13.el7_7.1 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8 | 8080020231030214932.63b34585 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8 | 8090020231030224841.a75119d5 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions | 8010020231101141358.c27ad7f8 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | 8020020231101135052.4cda2c84 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.2 Telecommunications Update Service | 8020020231101135052.4cda2c84 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions | 8020020231101135052.4cda2c84 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 8040020231101101624.522a0ee4 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.4 Telecommunications Update Service | 8040020231101101624.522a0ee4 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | 8040020231101101624.522a0ee4 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | 8060020231031165747.ad008a3a < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9 | 7:5.5-5.el9_2.1 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9 | 7:5.5-6.el9_3.1 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | 7:5.2-1.el9_0.3 < * (unaffected) |
Threat Intelligence Signals
EPSS Score
88.351%
Vulnerability Class
Memory Corruption
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Red Hat, Inc. · Vendor · USA |
| Reserved | 2023-10-27T08:36:38 |
| Published | 2023-11-03T07:58:05 |
| Patch Date | 2023-10-19 |
| Last Updated | 2026-08-07T01:10:11 |
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