high
7.5
CWE
319
Advisory Published
CVE Published
Updated

CVE-2022-43551

First published: Mon Dec 12 2022(Updated: )

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.

Credit: support@hackerone.com support@hackerone.com

Affected SoftwareAffected VersionHow to fix
redhat/jbcs-httpd24-curl<0:8.0.1-1.el8
0:8.0.1-1.el8
redhat/jbcs-httpd24-curl<0:8.0.1-1.el7
0:8.0.1-1.el7
Apple macOS Ventura<13.3
13.3
redhat/curl<7.87.0
7.87.0
IBM IBM® Engineering Requirements Management DOORS<=9.7.2.7
IBM IBM® Engineering Requirements Management DOORS Web Access<=9.7.2.7
Haxx Curl>=7.77.0<7.87.0
Fedoraproject Fedora=37
Netapp Active Iq Unified Manager Vmware Vsphere
Netapp Active Iq Unified Manager Windows
NetApp OnCommand Insight
NetApp OnCommand Workflow Automation
Netapp Snapcenter
Splunk Universal Forwarder>=8.2.0<8.2.12
Splunk Universal Forwarder>=9.0.0<9.0.6
Splunk Universal Forwarder=9.1.0

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2022-43551?

    The severity of CVE-2022-43551 is high.

  • How does the vulnerability in CVE-2022-43551 occur?

    The vulnerability in CVE-2022-43551 occurs when curl's HSTS check is bypassed.

  • Which software versions are affected by CVE-2022-43551?

    The affected software versions are Apple macOS Ventura up to version 13.3, curl up to version 7.87.0, jbcs-httpd24-curl up to version 0:8.0.1-1.el8, and jbcs-httpd24-curl up to version 0:8.0.1-1.el7.

  • How can I fix CVE-2022-43551?

    To fix CVE-2022-43551, update curl to version 7.87.0 or higher.

  • Where can I find more information about CVE-2022-43551?

    You can find more information about CVE-2022-43551 at the following references: [Link 1](https://curl.se/docs/CVE-2022-43551.html), [Link 2](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2155433), [Link 3](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2155434).

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