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ALPINE-CVE-2022-43552

ALPINE-CVE-2022-43552 PUBLISHED CVSS 5.900000095367432 MEDIUM

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

Risk Scores

CVSS 3.1
5.900000095367432
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

VendorProductVersions
Alpine:v3.16curl7.19.4-r0, 7.19.2-r1, 7.19.2-r0
Alpine:v3.14curl7.61.0-r0, 0, 7.19.2-r0
Alpine:v3.20curl7.21.7-r2, 7.70.0-r1, 7.65.0-r0
Alpine:v3.22curl7.52.0-r0, 7.71.0-r0, 7.70.0-r2
Alpine:v3.21curl7.42.1-r0, 0, 7.19.2-r0
Alpine:v3.17curl7.62.0-r0, 7.61.0-r0, 7.60.0-r1
Alpine:v3.18curl7.23.1-r0, 0, 7.19.2-r0
Alpine:v3.15curl7.70.0-r2, 7.71.0-r0, 7.71.0-r1
Alpine:v3.23curl7.64.0-r1, 7.83.1-r0, 7.83.0-r0
Alpine:v3.19curl7.82.0-r1, 7.82.0-r0, 7.81.0-r1

Exploit Intelligence

Timeline

  • Feb 9, 2023 CVE Published
  • Dec 3, 2025 CVE Updated
  • Apr 30, 2026 Distribution Patch
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