CVE-2013-6422 Security feature bypass in n/a

What is CVE-2013-6422?

CVE-2013-6422 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 23 Dec 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-20

Which versions are affected by CVE-2013-6422?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Haxx Libcurl.

How do I fix CVE-2013-6422?

Upgrade to a fixed version.

Is CVE-2013-6422 being exploited?

There is no known exploitation of CVE-2013-6422 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CURL-CVE-2013-6422, DEBIAN-CVE-2013-6422, DSA-2824-1, GHSA-fw5f-w62r-p5ww.