CVE-2021-38557: Billz/raspap webgui Raspap-webgui Vulnerability

HIGH
Advisory Identifier: GHSA-536p-4pcj-5mr9
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CVSS 8.8
CWE-732 CWE-276
Published
Advisory Summary

CVE-2021-38557 is a HIGH (CVSS 8.8) raspap-webgui vulnerability (CWE-732: Incorrect Permission Assignment for Critical Resource) affecting Billz/raspap webgui libraries in the Packagist ecosystem. The issue involves raspap-webgui in raspap 2.6.6 allows attackers to execute commands as root because of the insecure sudoers permissions.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-38557 at a Glance

CVE Identifier CVE-2021-38557
GHSA Identifier GHSA-536p-4pcj-5mr9
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-732: Incorrect Permission Assignment for Critical Resource
Affected Product Billz/raspap webgui
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2021-38557

To remediate this vulnerability, upgrade all affected Billz/raspap webgui dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

billz/raspap-webgui fixed: Latest secure release 
Upgrade billz/raspap-webgui to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for billz/raspap-webgui

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-38557, inspect your project dependencies for Billz/raspap webgui:

inspect dependencies for billz/raspap-webgui

Analyze the terminal output to locate any version of Billz/raspap webgui in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-732: Incorrect Permission Assignment for Critical Resource, where the product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. In Billz/raspap webgui, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

raspap-webgui in RaspAP 2.6.6 allows attackers to execute commands as root because of the insecure sudoers permissions. The www-data account can execute /etc/raspap/hostapd/enablelog.sh as root with no password; however, the www-data account can also overwrite /etc/raspap/hostapd/enablelog.sh with any executable content.

CVE-2021-38557 Affected Billz/raspap webgui Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
billz/raspap-webgui
 Packagist
≤ 2.6.6

References

NVD — CVE-2021-38557 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-38557
Billz/raspap webgui Source Repository REPOSITORY
https://github.com/RaspAP/raspap-webgui
Billz/raspap webgui Source Repository REPOSITORY
https://github.com/RaspAP/raspap-webgui/blob/fabc48c7daae4013b9888f266332e510b196a062/installers/raspap.sudoers
Billz/raspap webgui Security Information SECURITY
https://zerosecuritypenetrationtesting.com/?page_id=306

Frequently Asked Questions

What is CVE-2021-38557?
CVE-2021-38557 is a security vulnerability in Billz/raspap webgui involving raspap-webgui in RaspAP 2.6.6 allows attackers to execute commands as root because of the insecure sudoers permissions. under CWE-732: Incorrect Permission Assignment for Critical Resource.
Which Billz/raspap webgui versions are affected?
Affected versions include releases prior to current release patches across affected packages: billz/raspap-webgui.
What version fixes CVE-2021-38557?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is billz/raspap-webgui affected?
Yes, billz/raspap-webgui is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2021-38557?
CVE-2021-38557 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-38557?
CVE-2021-38557 is classified under CWE-732: Incorrect Permission Assignment for Critical Resource (The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.).
How can I check Packagist dependencies for CVE-2021-38557?
Run the dependency tree command: 'inspect dependencies for billz/raspap-webgui'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-536p-4pcj-5mr9",
  "modified" : "2021-09-03T20:36:06Z",
  "published" : "2021-09-02T17:10:52Z",
  "aliases" : [ "CVE-2021-38557" ],
  "summary" : "raspap-webgui in RaspAP 2.6.6 allows attackers to execute commands as root because of the insecure sudoers permissions.",
  "details" : "raspap-webgui in RaspAP 2.6.6 allows attackers to execute commands as root because of the insecure sudoers permissions. The www-data account can execute /etc/raspap/hostapd/enablelog.sh as root with no password; however, the www-data account can also overwrite /etc/raspap/hostapd/enablelog.sh with any executable content.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "billz/raspap-webgui"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.6.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-38557"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/RaspAP/raspap-webgui"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/RaspAP/raspap-webgui/blob/fabc48c7daae4013b9888f266332e510b196a062/installers/raspap.sudoers"
  }, {
    "type" : "WEB",
    "url" : "https://zerosecuritypenetrationtesting.com/?page_id=306"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-276", "CWE-732" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-25T19:43:55Z",
    "nvd_published_at" : "2021-08-24T13:15:00Z"
  }
}