SB2020022519 - Multiple vulnerabilities in ProFTPD

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Main Vulnerability Database SB2020022519

SB2020022519 - Multiple vulnerabilities in ProFTPD

Published: February 25, 2020 Updated: March 17, 2020

Security Bulletin ID SB2020022519
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2020-9273)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing data transfer within the alloc_pool() function in pool.c. A remote authenticated attacker can trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


2) Out-of-bounds read (CVE-ID: CVE-2020-9272)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in mod_cap within bundled libpcab library code (via the cap_text.c cap_to_text function). A remote attacker can send specially crafted traffic to the server, trigger an out-of-bounds read error and read contents of memory on the system.


3) NULL pointer dereference (CVE-ID: CVE-2019-19269)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference in tls_verify_crl() function in ProFTPD while processing data, returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. A remote attacker can trigger the NULL pointer dereference error when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.

Successful exploitation of the vulnerability will result in a denial of service condition.


Remediation

Install update from vendor's website.

References