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CVE-2013-6422

UnknownEPSS 2.76%

Last modified

CVE-2013-6422 is a vulnerability of currently unknown severity. The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification (CURLOPT_SSL_VERIFYPEER), also disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.. EPSS estimates a 2.76% chance of exploitation in the next 30 days.

Description

The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification (CURLOPT_SSL_VERIFYPEER), also disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.

Metrics

EPSS Probability
2.76%

84.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DebianDebian Linux7.0
CanonicalUbuntu Linux12.04
CanonicalUbuntu Linux12.10
CanonicalUbuntu Linux13.04
CanonicalUbuntu Linux13.10
HaxxLibcurl7.21.4
HaxxLibcurl7.21.5
HaxxLibcurl7.21.6
HaxxLibcurl7.21.7
HaxxLibcurl7.22.0
HaxxLibcurl7.23.0
HaxxLibcurl7.23.1
HaxxLibcurl7.24.0
HaxxLibcurl7.25.0
HaxxLibcurl7.26.0
HaxxLibcurl7.27.0
HaxxLibcurl7.28.0
HaxxLibcurl7.28.1
HaxxLibcurl7.29.0
HaxxLibcurl7.30.0
HaxxLibcurl7.31.0
HaxxLibcurl7.32.0
HaxxLibcurl7.33.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2013-6422?
The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification (CURLOPT_SSL_VERIFYPEER), also disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.
How severe is CVE-2013-6422?
Severity scoring for CVE-2013-6422 is pending analysis. The EPSS model estimates a 2.76% probability of exploitation in the next 30 days.
How do I fix CVE-2013-6422?
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.

How Strix Helps

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Source: NVD / NIST