CVE-2022-39958 Response body bypass in OWASP ModSecurity Core Rule Set via repeated HTTP Range header submission with a small byte range

2022-09-2000:00:00

CWE-863

NCSC.ch

www.cve.org

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

8.7 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

65.3%

JSON

The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by repeatedly submitting an HTTP Range header field with a small byte range. A restricted resource, access to which would ordinarily be detected, may be exfiltrated from the backend, despite being protected by a web application firewall that uses CRS. Short subsections of a restricted resource may bypass pattern matching techniques and allow undetected access. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised to upgrade to 3.2.2 and 3.3.3 respectively and to configure a CRS paranoia level of 3 or higher.

CNA Affected

[
  {
    "vendor": "OWASP",
    "product": "ModSecurity Core Rule Set",
    "versions": [
      {
        "version": "3.0.x",
        "status": "affected"
      },
      {
        "version": "3.1.x",
        "status": "affected"
      },
      {
        "version": "unspecified",
        "lessThanOrEqual": "3.2.1",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "unspecified",
        "lessThanOrEqual": "3.3.2",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]