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CVE-2016-9952

HIGHCVSS 8.1/10EPSS 1.30%

Last modified

CVE-2016-9952 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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, makes it easier for remote attackers to conduct man-in-the-middle attacks via a crafted wildcard SAN in a server certificate, as demonstrated by "*.com.". EPSS estimates a 1.30% chance of exploitation in the next 30 days.

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, makes it easier for remote attackers to conduct man-in-the-middle attacks via a crafted wildcard SAN in a server certificate, as demonstrated by "*.com."

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
1.30%

66.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
HaxxCurl>= 7.30.0, <= 7.51.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-9952?
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, makes it easier for remote attackers to conduct man-in-the-middle attacks via a crafted wildcard SAN in a server certificate, as demonstrated by "*.com."
How severe is CVE-2016-9952?
CVE-2016-9952 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.30% probability of exploitation in the next 30 days.
How do I fix CVE-2016-9952?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-9952?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST