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CVE-2016-3739

UnknownEPSS 6.38%

Last modified

CVE-2016-3739 is a vulnerability of currently unknown severity. The (1) mbed_connect_step1 function in lib/vtls/mbedtls.c and (2) polarssl_connect_step1 function in lib/vtls/polarssl.c in cURL and libcurl before 7.49.0, when using SSLv3 or making a TLS connection to a URL that uses a numerical IP address, allow remote attackers to spoof servers via an arbitrary valid certificate.. EPSS estimates a 6.38% chance of exploitation in the next 30 days.

Description

The (1) mbed_connect_step1 function in lib/vtls/mbedtls.c and (2) polarssl_connect_step1 function in lib/vtls/polarssl.c in cURL and libcurl before 7.49.0, when using SSLv3 or making a TLS connection to a URL that uses a numerical IP address, allow remote attackers to spoof servers via an arbitrary valid certificate.

Metrics

EPSS Probability
6.38%

92.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
HaxxCurl7.21.0
HaxxCurl7.21.1
HaxxCurl7.21.2
HaxxCurl7.21.3
HaxxCurl7.21.4
HaxxCurl7.21.5
HaxxCurl7.21.6
HaxxCurl7.21.7
HaxxCurl7.22.0
HaxxCurl7.23.0
HaxxCurl7.23.1
HaxxCurl7.24.0
HaxxCurl7.25.0
HaxxCurl7.26.0
HaxxCurl7.27.0
HaxxCurl7.28.0
HaxxCurl7.28.1
HaxxCurl7.29.0
HaxxCurl7.30.0
HaxxCurl7.31.0
HaxxCurl7.32.0
HaxxCurl7.33.0
HaxxCurl7.34.0
HaxxCurl7.35.0
HaxxCurl7.36.0
HaxxCurl7.38.0
HaxxCurl7.39.0
HaxxCurl7.40.0
HaxxCurl7.41.0
HaxxCurl7.42.0
HaxxCurl7.42.1
HaxxCurl7.43.0
HaxxCurl7.44.0
HaxxCurl7.45.0
HaxxCurl7.46.0
HaxxCurl7.47.0
HaxxCurl7.48.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-3739?
The (1) mbed_connect_step1 function in lib/vtls/mbedtls.c and (2) polarssl_connect_step1 function in lib/vtls/polarssl.c in cURL and libcurl before 7.49.0, when using SSLv3 or making a TLS connection to a URL that uses a numerical IP address, allow remote attackers to spoof servers via an arbitrary valid certificate.
How severe is CVE-2016-3739?
Severity scoring for CVE-2016-3739 is pending analysis. The EPSS model estimates a 6.38% probability of exploitation in the next 30 days.
How do I fix CVE-2016-3739?
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-2016-3739?

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

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Source: NVD / NIST