SB2020082718 - Multiple vulnerabilities in atftpd daemon

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Main Vulnerability Database SB2020082718

SB2020082718 - Multiple vulnerabilities in atftpd daemon

Published: August 27, 2020 Updated: September 4, 2023

Security Bulletin ID SB2020082718
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Reachable Assertion (CVE-ID: CVE-2020-6097)

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

The vulnerability exists due to a reachable assertion in the atftpd daemon functionality. A remote attacker can use a specially crafted sequence of RRQ-Multicast requests to trigger an assert() call and cause a denial of service conditon on the target system.


2) Out-of-bounds read (CVE-ID: CVE-2021-46671)

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

The vulnerability exists due to a boundary condition in options.c. A remote attacker can create a specially data to the application, trigger an out-of-bounds read error and read contents of memory on the system.


3) Buffer overflow (CVE-ID: CVE-2021-41054)

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

The vulnerability exists due to a boundary in tftpd_file.c. A remote attacker can send specially crafted data to the server, trigger memory corruption and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References