CVE-2016-9953

Description

The verify_certificate function in lib/vtls/schannel.c in libcurl 7.30.0 through 7.51.0, when built for Windows CE using the schannel TLS backend, allows remote attackers to obtain sensitive information, cause a denial of service (crash), or possibly have unspecified other impact via a wildcard certificate name, which triggers an out-of-bounds read.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.95% Top 20%
Vendor Advisory haxx.se Vendor Advisory haxx.se
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://curl.haxx.se/CVE-2016-9952.patch vendor advisory
https://curl.haxx.se/docs/adv_20161221C.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-9953?
CVE-2016-9953 has been scored as a critical severity vulnerability.
How to fix CVE-2016-9953?
To fix CVE-2016-9953, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-9953 being actively exploited in the wild?
It is possible that CVE-2016-9953 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.