# CVE-2023-46847: Squid: denial of service in http digest authentication

- Exploited (CISA KEV): no
- Published: 2023-11-03
- CVSS: 8.6 HIGH (v3.1)
- EPSS: 78.5% (100th percentile)
- CWE: CWE-120

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2023-12-12 | 39 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2023-12-12 · new · rule 200011094
  > Added: signature 200011094 "Squid Proxy Buffer Overflow" (Buffer Overflow, risk High), systems: Other Web Server. References: CVE-2023-46847.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2023-46847 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2023-46847