Is CVE-2022-42916 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 2%.

What products does CVE-2022-42916 affect?

Tracked products affected include curl. Check the version you run to see whether it is affected.

How do I fix CVE-2022-42916?

Apply the vendor fix promptly. Upgrade affected products to a fixed version.

CVE-2022-42916

Q: What is CVE-2022-42916?

CVE-2022-42916 is a high-severity software vulnerability (CWE-319) with a CVSS score of 7.5. In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided i

HIGH severity · CVSS 7.5 · CWE-319

7.5CVSS HIGH

Summary

In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactNone

Availability impactNone

Exploit probability (EPSS)2%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products we track (1)

curl

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

CVE-2022-42916

Summary

Impact & exploitability

Affected products we track (1)

Recommendation

Additional information