Description
An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. A number of heap-based buffer over-read instances are present in mbstring regular expression functions when supplied with invalid multibyte data. These occur in ext/mbstring/oniguruma/regcomp.c, ext/mbstring/oniguruma/regexec.c, ext/mbstring/oniguruma/regparse.c, ext/mbstring/oniguruma/enc/unicode.c, and ext/mbstring/oniguruma/src/utf32_be.c when a multibyte regular expression pattern contains invalid multibyte sequences.
Remediation
References
Related Vulnerabilities
Oracle Application Server CVE-2009-0993 Vulnerability (CVE-2009-0993)
Python CVE-2018-1060 Vulnerability (CVE-2018-1060)
PostgreSQL Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2010-1169)
Internet Information Services Other Vulnerability (CVE-2002-1695)
IBM RTC Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2015-7449)