canonical ubuntu-linux CVE-2021-25220 vulnerability in Canonical and Other Products
Published on March 23, 2022

DNS forwarders - cache poisoning vulnerability

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BIND 9.11.0 -> 9.11.36 9.12.0 -> 9.16.26 9.17.0 -> 9.18.0 BIND Supported Preview Editions: 9.11.4-S1 -> 9.11.36-S1 9.16.8-S1 -> 9.16.26-S1 Versions of BIND 9 earlier than those shown - back to 9.1.0, including Supported Preview Editions - are also believed to be affected but have not been tested as they are EOL. The cache could become poisoned with incorrect records leading to queries being made to the wrong servers, which might also result in false information being returned to clients.

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Vulnerability Analysis

CVE-2021-25220 is exploitable with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
HIGH
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
NONE
Integrity Impact:
HIGH
Availability Impact:
NONE

Products Associated with CVE-2021-25220

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-25220 are published in these products:

Canonical Ubuntu Linux
 
ISC BIND
 
Fedora Project Fedora
 
Siemens Sinec Ins
 

Affected Versions

ISC BIND:

Exploit Probability

EPSS
0.11%
Percentile
29.75%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.