CyberRota Analysis
This is a critical severity vulnerability with a CVSS score of 9.8. It may be remotely exploitable. It may lead to a denial-of-service condition.
CVE
CVE-2017-8923
Severity
CRITICAL
CVSS
9.8
EPSS
7.19%
Original NVD Description
The zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string.
Related CVEs
Other vulnerabilities affecting the same vendor(s)