CVE-2023-5517 Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled

2024-02-1314:04:54

isc

www.cve.org

cve-2023-5517

query-handling code

nxdomain-redirect" configuration

ptr query

bind 9

security flaw

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

0.001 Low

EPSS

Percentile

41.9%

JSON

A flaw in query-handling code can cause named to exit prematurely with an assertion failure when:

nxdomain-redirect <domain>; is configured, and
the resolver receives a PTR query for an RFC 1918 address that would normally result in an authoritative NXDOMAIN response.
This issue affects BIND 9 versions 9.12.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

CNA Affected

[
  {
    "vendor": "ISC",
    "product": "BIND 9",
    "versions": [
      {
        "version": "9.12.0",
        "lessThanOrEqual": "9.16.45",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.18.0",
        "lessThanOrEqual": "9.18.21",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.19.0",
        "lessThanOrEqual": "9.19.19",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.16.8-S1",
        "lessThanOrEqual": "9.16.45-S1",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.18.11-S1",
        "lessThanOrEqual": "9.18.21-S1",
        "status": "affected",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]