SB2021012611 - Red Hat Enterprise Linux Server AUS 7.3 update for dnsmasq 

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Main Vulnerability Database SB2021012611

SB2021012611 - Red Hat Enterprise Linux Server AUS 7.3 update for dnsmasq

Published: January 26, 2021

Security Bulletin ID SB2021012611
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Insufficient verification of data authenticity (CVE-ID: CVE-2020-25684)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a lack of proper address/port check within the "reply_query" function. A remote attacker can perform a DNS cache poisoning attack.


2) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2020-25685)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a lack of query resource name (RRNAME) checks in the "reply_query" function. A remote attacker can perform a DNS cache poisoning attack.


3) Insufficient verification of data authenticity (CVE-ID: CVE-2020-25686)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected software does not check for an existing pending request for the same name and forwards a new request. A remote attacker can perform a DNS cache poisoning attack.


Remediation

Install update from vendor's website.

References