CVE-2022-43551

high Splunk
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 90% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Published: December 23, 2022 (1237 days ago)
Last Modified: February 13, 2026
Vendor: Splunk

Description

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.

CWE

CWE-319

Affected Products

haxx curlfedoraproject fedoranetapp active iq unified managernetapp oncommand insightnetapp oncommand workflow automationnetapp snapcentersplunk universal forwarder

References

🔗 hackerone.com 🔗 lists.fedoraproject.org 🔗 security.gentoo.org 🔗 security.netapp.com 🔗 hackerone.com