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

2024-02-1314:04:54

isc

github.com

bind 9

query handling

flaw

assertion failure

rfc 1918

reverse zones

nxdomain redirect

cve-2023-5517

CVSS3

7.5

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

AI Score

6.9

Confidence

Low

SSVC

Exploitation

none

Automatable

yes

Technical Impact

partial

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.

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:isc:bind_9:*:*:*:*:*:*:*:*"
    ],
    "vendor": "isc",
    "product": "bind_9",
    "versions": [
      {
        "status": "affected",
        "version": "9.12.0",
        "versionType": "custom",
        "lessThanOrEqual": "9.16.45"
      },
      {
        "status": "affected",
        "version": "9.18.0",
        "versionType": "custom",
        "lessThanOrEqual": "9.18.21"
      },
      {
        "status": "affected",
        "version": "9.19.0",
        "versionType": "custom",
        "lessThanOrEqual": "9.19.19"
      },
      {
        "status": "affected",
        "version": "9.16.8-S1",
        "versionType": "custom",
        "lessThanOrEqual": "9.16.45-S1"
      },
      {
        "status": "affected",
        "version": "9.18.11-S1",
        "versionType": "custom",
        "lessThanOrEqual": "9.18.21-S1"
      }
    ],
    "defaultStatus": "unknown"
  }
]