CVE-2022-38177 Memory leak in ECDSA DNSSEC verification code

2022-09-2100:00:00

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

0.003 Low

EPSS

Percentile

66.1%

JSON

By spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.

CNA Affected

[
  {
    "vendor": "ISC",
    "product": "BIND9",
    "versions": [
      {
        "version": "Open Source Branches 9.8 through 9.16 9.8.4 through versions before 9.16.33",
        "status": "affected"
      },
      {
        "version": "Supported Preview Branches 9.9-S through 9.11-S 9.9.4-S1 through versions up to and including 9.11.37-S1",
        "status": "affected"
      },
      {
        "version": "Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1",
        "status": "affected"
      }
    ]
  }
]