SB2022011852 - Ubuntu update for ruby2.3

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Main Vulnerability Database SB2022011852

SB2022011852 - Ubuntu update for ruby2.3

Published: January 18, 2022

Security Bulletin ID SB2022011852
Severity
High
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 33% Medium 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Buffer overflow (CVE-ID: CVE-2021-41816)

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

The vulnerability exists due to a boundary error in CGI.escape_html. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


2) Incorrect Regular Expression (CVE-ID: CVE-2021-41817)

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

The vulnerability exists due to insufficient input validation when processing regular expressions on date parsing methods. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.


3) Spoofing attack (CVE-ID: CVE-2021-41819)

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in CGI::Cookie.parse. A remote attacker can spoof page content.


Remediation

Install update from vendor's website.

References