VDB
ALPINE-CVE-2018-1000027
ALPINE-CVE-2018-1000027
PUBLISHED
CVSS 7.5 HIGH
The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later.
Risk Scores
CVSS v3.0
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.19 | squid | 3.5.8-r0, 0, 2.7.6-r0 |
| Alpine:v3.11 | squid | 3.2.4-r0, 3.2.5-r0, 3.2.6-r0 |
| Alpine:v3.20 | squid | 3.2.0.18-r1, 3.2.0.18-r0, 3.4.6-r0 |
| Alpine:v3.10 | squid | 3.5.8-r0, 3.5.7-r0, 3.5.6-r1 |
| Alpine:v3.7 | squid | 3.5.14-r0, 2.7.9-r3, 3.3.11-r0 |
| Alpine:v3.16 | squid | 3.5.6-r0, 3.2.5-r0, 3.2.6-r0 |
| Alpine:v3.18 | squid | 2.7.6-r6, 3.2.0.17-r0, 3.2.0.16-r0 |
| Alpine:v3.23 | squid | 3.3.11-r1, 3.3.11-r0, 3.3.10-r0 |
| Alpine:v3.5 | squid | 3.3.6-r0, 3.5.8-r0, 3.5.7-r0 |
| Alpine:v3.21 | squid | 2.7.6-r6, 2.7.6-r9, 2.7.7-r0 |
| Alpine:v3.8 | squid | 2.7.7-r4, 3.3.3-r0, 3.3.4-r0 |
| Alpine:v3.4 | squid | 3.3.11-r0, 3.3.10-r0, 3.2.7-r2 |
| Alpine:v3.6 | squid | 3.5.19-r0, 0, 2.7.6-r0 |
| Alpine:v3.12 | squid | 3.5.8-r0, 0, 2.7.6-r1 |
| Alpine:v3.22 | squid | 3.5.23-r2, 3.5.8-r0, 3.5.7-r0 |
| Alpine:v3.13 | squid | 3.5.8-r0, 3.5.7-r0, 3.5.6-r1 |
| Alpine:v3.14 | squid | 2.7.6-r10, 3.5.8-r0, 3.5.7-r0 |
| Alpine:v3.9 | squid | 3.5.8-r0, 0, 2.7.6-r0 |
| Alpine:v3.17 | squid | 3.5.14-r0, 0, 2.7.6-r0 |
| Alpine:v3.15 | squid | 2.7.6-r1, 2.7.6-r8, 2.7.6-r9 |
Timeline
- Feb 9, 2018 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch