Critical severity · published Aug 6, 2018
CVE-2017-6920
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
9.8
CVSS
20.2%
EPSS
No
On KEV
Description
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 vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)20.2% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DR
Drupal · Drupal
8.0.0 before 8.3.4 · source: NVD
DC
Drupal Core · Drupal.org
8 prior to 8.3.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-6920
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-6920
Third Party Advisory
http://www.securityfocus.com/bid/99211
Third Party Advisory
http://www.securitytracker.com/id/1038781
Patch
https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple
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