SB2020122604 - Fedora 33 update for guacamole-server

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Main Vulnerability Database SB2020122604

SB2020122604 - Fedora 33 update for guacamole-server

Published: December 26, 2020 Updated: April 25, 2025

Security Bulletin ID SB2020122604
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Access of Uninitialized Pointer (CVE-ID: CVE-2020-9498)

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to the affected software mishandles pointers involved in processing data received via RDP static virtual channels. A remote attacker can use a specially crafted PDUs and execute arbitrary code on the target system.


2) Input validation error (CVE-ID: CVE-2020-9497)

The vulnerability allows a remote attacker to gain access to sensitive information on the system.

The vulnerability exists due to insufficient validation of user-supplied input of RDP static virtual channels. A remote attacker can use a specially crafted PDUs to disclose sensitive information within the memory of the guacd process handling the connection.  


Remediation

Install update from vendor's website.

References