A vulnerability, which was classified as problematic, was found in ProFTPD up to 1.3.5 (File Transfer Software). This affects the function tls_verify_crl of the component CRL Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality. The summary by CVE is:

An issue was discovered in tls_verify_crl in ProFTPD before 1.3.6. A wrong iteration variable, used when checking a client certificate against CRL entries (installed by a system administrator), can cause some CRL entries to be ignored, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

The weakness was released 11/26/2019. This vulnerability is uniquely identified as CVE-2019-19271 since 11/26/2019. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1587.003 for this issue.

Upgrading to version 1.3.6 eliminates this vulnerability.

Entries connected to this vulnerability are available at 146362 and 146360.

Productinfo

Type

• File Transfer Software

Name

• ProFTPD

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.3.5

License

• open-source

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CPE 2.2info

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