CVE-2019-19270 Security feature bypass in n/a

High 7.5 Published Updated

ProFTPD fails to properly validate CRL entries, allowing revoked client certificates to bypass security checks and connect to the server.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2019-19270?

CVE-2019-19270 is a high-severity vulnerability in Fedoraproject Fedora, published on 26 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

Weakness: CWE-295

Which versions are affected by CVE-2019-19270?

It affects 2 products.

Products include Fedoraproject Fedora, Proftpd Proftpd.

How do I fix CVE-2019-19270?

Apply the vendor's patch.

Is CVE-2019-19270 being exploited?

There is no known exploitation of CVE-2019-19270 in the wild and no public exploit code.

All Fedoraproject Fedora vulnerabilities

Sources

Also known as DEBIAN-CVE-2019-19270, GHSA-5pjj-3qp3-rjg3, UBUNTU-CVE-2019-19270.

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