Detections
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Curl Cleartext Information Disclosure < 7.87 (CVE-2022-43551)

high Nessus Plugin ID 171858

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Synopsis

The remote Windows host has a program that is affected by an information disclosure vulnerability.

Description

The version of Curl installed on the remote host is prior to 7.87.0. It is therefore affected by an information disclosure vulnerability where the HSTS mechanism could be bypassed to trick curl to keep using HTTP.
Using its HSTS support, curl can be instructed to use HTTPS instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. However, the HSTS mechanism could be bypassed if the host name in the given URL first uses IDN characters that get replaced to ASCII counterparts as part of the IDN conversion. Like using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop (U+002E) `.`. Then in a subsequent request, it does not detect the HSTS state and makes a clear text transfer. Because it would store the info IDN encoded but look for it IDN decoded.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade Curl to version 7.87.0 or later

See Also

https://curl.se/docs/CVE-2022-43551.html

Plugin Details

Severity: High

ID: 171858

File Name: curl_win_cve-2022-43551.nasl

Version: 1.3

Type: local

Agent: windows

Family: Windows

Published: 2/23/2023

Updated: 9/1/2023

Configuration: Enable thorough checks

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2022-43551

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:haxx:curl

Required KB Items: installed_sw/Curl, SMB/Registry/Enumerated

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/21/2022

Vulnerability Publication Date: 12/21/2022

Reference Information

CVE: CVE-2022-43551

IAVA: 2023-A-0008-S