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CVE-2022-39957— Response body bypass in OWASP ModSecurity Core Rule Set via a specialy crafted charset in the HTTP Accept header

Quick assessment

Affected
OWASP ModSecurity Core Rule Set
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OWASP ModSecurity Core Rule Set（CRS）是一组用于ModSecurity或兼容的Web应用程序防火墙的通用攻击检测规则。 OWASP ModSecurity Core Rule Set (CRS)存在安全漏洞，该漏洞源于字符集接受头字段，导致响应规则集绕过。

CVSS 7.3 · High EPSS 0.82% · P55

Possible ATT&CK Techniques 1 AI

T1564.004 · NTFS File Attributes
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I. Basic Information for CVE-2022-39957

Vulnerability Information
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Vulnerability Title
Response body bypass in OWASP ModSecurity Core Rule Set via a specialy crafted charset in the HTTP Accept header
Source: CVE Program / CVE List V5
Vulnerability Description
The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass. A client can issue an HTTP Accept header field containing an optional "charset" parameter in order to receive the response in an encoded form. Depending on the "charset", this response can not be decoded by the web application firewall. A restricted resource, access to which would ordinarily be detected, may therefore bypass detection. 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5
Vulnerability Title
OWASP ModSecurity Core Rule Set 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OWASP ModSecurity Core Rule Set（CRS）是一组用于ModSecurity或兼容的Web应用程序防火墙的通用攻击检测规则。 OWASP ModSecurity Core Rule Set (CRS)存在安全漏洞，该漏洞源于字符集接受头字段，导致响应规则集绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OWASP ModSecurity Core Rule Set 3.0.x -

II. Public POCs for CVE-2022-39957

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III. Intelligence Information for CVE-2022-39957

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Vendor Advisories for CVE-2022-39957 (1)

Mailing List Discussions for CVE-2022-39957 (3)

Other References for CVE-2022-39957 (1)

Same Patch Batch · OWASP · 2022-09-20 · 4 CVEs total

CVE-2022-39958 7.5 HIGH Response body bypass in OWASP ModSecurity Core Rule Set via repeated HTTP Range header sub
CVE-2022-39955 7.3 HIGH Partial rule set bypass in OWASP ModSecurity Core Rule Set by submitting a specially craft
CVE-2022-39956 7.3 HIGH Partial rule set bypass in OWASP ModSecurity Core Rule Set for HTTP multipart requests us

IV. Related Vulnerabilities

Same product: ModSecurity Core Rule Set
Same vendor: OWASP
Same weakness: CWE-693

V. Comments for CVE-2022-39957

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