Strix
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CVE-2021-25220

MEDIUMCVSS 6.8/10EPSS 3.25%

Last modified

CVE-2021-25220 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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.. EPSS estimates a 3.25% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
6.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N

EPSS Probability
3.25%

86.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
IscBind>= 9.11.0, < 9.11.37—
IscBind>= 9.11.4, < 9.11.37—
IscBind>= 9.12.0, < 9.16.27—
IscBind>= 9.16.8, < 9.16.27—
IscBind>= 9.17.0, <= 9.18.0—
FedoraprojectFedora34—
FedoraprojectFedora35—
FedoraprojectFedora36—
NetappH300s FirmwareAll versions—
NetappH500s FirmwareAll versions—
NetappH700s FirmwareAll versions—
NetappH300e FirmwareAll versions—
NetappH500e FirmwareAll versions—
NetappH700e FirmwareAll versions—
NetappH410s FirmwareAll versions—
NetappH410c FirmwareAll versions—
SiemensSinec Ins< 1.0—
SiemensSinec Ins1.0—
JuniperJunos< 19.3—
JuniperJunos19.3—
JuniperJunos19.4—
JuniperJunos20.2—
JuniperJunos20.3—
JuniperJunos20.4—
JuniperJunos21.1—
JuniperJunos21.2—
JuniperJunos21.3—
JuniperJunos21.4—
JuniperJunos22.1R1
JuniperJunos22.2R1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-25220?
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.
How severe is CVE-2021-25220?
CVE-2021-25220 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 3.25% probability of exploitation in the next 30 days.
How do I fix CVE-2021-25220?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-25220?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST