CVE-2019-9023

Name of the Vulnerable Software and Affected Versions PHP versions prior to 5.6.40 PHP versions 7.0.x through 7.1.25 PHP versions 7.2.x through 7.2.13 PHP versions 7.3.x through 7.3.0

Description The issue is related to heap-based buffer over-read instances in mbstring regular expression functions when supplied with invalid multibyte data. This can occur in various files, including regcomp.c, regexec.c, regparse.c, unicode.c, and utf32 be.c, when a multibyte regular expression pattern contains invalid multibyte sequences. Exploitation of this issue may allow a remote attacker to cause a denial of service, breach confidentiality, and integrity of protected data by sending specially crafted data.

Recommendations For PHP versions prior to 5.6.40, update to version 5.6.40 or later. For PHP versions 7.0.x through 7.1.25, update to version 7.1.26 or later. For PHP versions 7.2.x through 7.2.13, update to version 7.2.14 or later. For PHP versions 7.3.x through 7.3.0, update to version 7.3.1 or later.