SB20230820136 - Fedora 37 update for maradns

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Main Vulnerability Database SB20230820136

SB20230820136 - Fedora 37 update for maradns

Published: August 20, 2023

Security Bulletin ID SB20230820136
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Resource management error (CVE-ID: CVE-2022-30256)

CWE-ID: CWE-399 - Resource Management Errors

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to bypass expected security restrictions.

The vulnerability exists due to the way MaraDNS handles cached domain names. A revoked domain name can still be resolvable for a long time, including expired domains and taken-down malicious domains.


2) Integer underflow (CVE-ID: CVE-2023-31137)

CWE-ID: CWE-191 - Integer underflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


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

The vulnerability exists due to integer underflow when handling a DNS packet with an Answer RR of qtype 16 (TXT record) and any qclass. A remote attacker can send a specially crafted request to the server, trigger an integer underflow and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References