SB2022092143 - Ubuntu update for bind9

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Main Vulnerability Database SB2022092143

SB2022092143 - Ubuntu update for bind9

Published: September 21, 2022

Security Bulletin ID SB2022092143
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
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 2 secuirty vulnerabilities.


1) Resource management error (CVE-ID: CVE-2022-2795)

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

The vulnerability exists due to improper management of internal resources within the application when processing large delegations. A remote attacker can flood the target resolver with queries and perform a denial of service (DoS) attack.


2) Memory leak (CVE-ID: CVE-2022-38177)

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in the DNSSEC verification code for the ECDSA algorithm. A remote attacker can spoof the target resolver with responses that have a malformed ECDSA signature and perform denial of service attack.


Remediation

Install update from vendor's website.

References