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CVE-2022-43552

Date: February 8, 2023

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.

Language: C

Severity Score

Related Resources (10)

http://seclists.org/fulldisclosure/2023/Mar/17
https://security.alpinelinux.org/vuln/CVE-2022-43552
https://hackerone.com/reports/1764858
https://security-tracker.debian.org/tracker/CVE-2022-43552
https://access.redhat.com/security/cve/CVE-2022-43552
https://support.apple.com/kb/HT213670
https://nvd.nist.gov/vuln/detail/CVE-2022-43552
https://security.netapp.com/advisory/ntap-20230214-0002/
https://security.gentoo.org/glsa/202310-12
https://www.mend.io/vulnerability-database/CVE-2022-43552

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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