CVE-2019-9023
CVSS v3
9.8
CRITICAL
EPSS Score
11.5 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2019-02-22
Frequently asked questions
What is CVE-2019-9023?
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.
Is CVE-2019-9023 actively exploited?
Active exploitation of CVE-2019-9023 has not been confirmed. The EPSS score is 11.5%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-9023?
CVE-2019-9023 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2019-9023 affecting your environment?
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