CVE Vulnerabilities

CVE-2022-43551

Cleartext Transmission of Sensitive Information

Published: Dec 23, 2022 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Ubuntu
MEDIUM

A vulnerability exists in curl <7.87.0 HSTS check that could be bypassed to trick it 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.

Weakness

The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.

Affected Software

Name Vendor Start Version End Version
Curl Haxx 7.77.0 (including) 7.87.0 (excluding)
JBCS httpd 2.4.51.sp2 RedHat jbcs-httpd24-curl *
JBoss Core Services for RHEL 8 RedHat jbcs-httpd24-curl-0:8.0.1-1.el8jbcs *
JBoss Core Services on RHEL 7 RedHat jbcs-httpd24-curl-0:8.0.1-1.el7jbcs *
Curl Ubuntu devel *
Curl Ubuntu jammy *
Curl Ubuntu kinetic *
Curl Ubuntu lunar *
Curl Ubuntu trusty *
Curl Ubuntu xenial *

Potential Mitigations

References