Vulnerability Name:

CVE-2017-6920 (CCN-127566)

Assigned:2017-06-21
Published:2017-06-21
Updated:2018-10-04
Summary:Drupal core 8 before versions 8.3.4 allows remote attackers to execute arbitrary code due to the PECL YAML parser not handling PHP objects safely during certain operations.
CVSS v3 Severity:9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/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): High
Integrity (I): High
Availibility (A): High
9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/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): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-19
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2017-6920

Source: BID
Type: Third Party Advisory, VDB Entry
99211

Source: CCN
Type: BID-99211
Drupal Core CVE-2017-6920 Remote Code Execution Vulnerability

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

Source: XF
Type: UNKNOWN
drupal-cve20176920-code-exec(127566)

Source: CONFIRM
Type: Patch, 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

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