CVE-2021-25215 An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself

2021-04-2800:00:00

isc

www.cve.org

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.8 High

AI Score

Confidence

High

0.067 Low

EPSS

Percentile

93.9%

JSON

In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a query for a record triggering the flaw described above, the named process will terminate due to a failed assertion check. The vulnerability affects all currently maintained BIND 9 branches (9.11, 9.11-S, 9.16, 9.16-S, 9.17) as well as all other versions of BIND 9.

CNA Affected

[
  {
    "product": "BIND9",
    "vendor": "ISC",
    "versions": [
      {
        "status": "affected",
        "version": "Open Source Branches 9.0 through 9.11 9.0.0 through versions before 9.11.30"
      },
      {
        "status": "affected",
        "version": "Open Source Branches 9.12 through 9.16 9.12.0 through versions before 9.16.14"
      },
      {
        "status": "affected",
        "version": "Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions before 9.11.30-S1"
      },
      {
        "status": "affected",
        "version": "Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.14-S1"
      },
      {
        "status": "affected",
        "version": "Development Branch 9.17 9.17.0 through versiosn before 9.17.12"
      }
    ]
  }
]