Vulnerability Name:

CVE-2017-6921 (CCN-127567)

Assigned:2017-06-21
Published:2017-06-21
Updated:2019-10-09
Summary:In Drupal 8 prior to 8.3.4; The file REST resource does not properly validate some fields when manipulating files. A site is only affected by this if the site has the RESTful Web Services (rest) module enabled, the file REST resource is enabled and allows PATCH requests, and an attacker can get or register a user account on the site with permissions to upload files and to modify the file resource.
CVSS v3 Severity:5.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-20
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2017-6921

Source: BID
Type: Third Party Advisory, VDB Entry
99222

Source: CCN
Type: BID-99222
Drupal Core CVE-2017-6921 Security Bypass Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1038781

Source: XF
Type: UNKNOWN
drupal-cve20176921-sec-bypass(127567)

Source: CONFIRM
Type: Mitigation, Vendor Advisory
https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple

Source: CCN
Type: DRUPAL-SA-CORE-2017-003
Drupal Core - Multiple Vulnerabilities

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2017-6921

Vulnerable Configuration:Configuration 1:
  • cpe:/a:drupal:drupal:*:*:*:*:*:*:*:* (Version >= 8.0.0 and < 8.3.4)

    • Configuration CCN 1:
  • cpe:/a:drupal:drupal:7.55:*:*:*:*:*:*:*
  • OR cpe:/a:drupal:drupal:8.3.3:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    drupal drupal *
    drupal drupal 7.55
    drupal drupal 8.3.3