CVE-2019-19012

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 10.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-11-17 · updated 2026-06-17
Weakness: CWE-125

Description

An integer overflow in the search_in_range function in regexec.c in Oniguruma 6.x before 6.9.4_rc2 leads to an out-of-bounds read, in which the offset of this read is under the control of an attacker. (This only affects the 32-bit compiled version). Remote attackers can cause a denial-of-service or information disclosure, or possibly have unspecified other impact, via a crafted regular expression.

Affected products

Debian Linux: 8.0
Fedoraproject Fedora: 30, 31
Oniguruma Project Oniguruma: from 6.0.0 through 6.9.3; 6.9.4-rc1
Red Hat Enterprise Linux: 8.0

References

https://github.com/kkos/oniguruma/issues/164
https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2
https://github.com/tarantula-team/CVE-2019-19012
https://lists.debian.org/debian-lts-announce/2019/12/msg00002.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3MBNW6Z4DOXSCNWGBLQ7OA3OGUJ44WL/
https://usn.ubuntu.com/4460-1/
https://github.com/kkos/oniguruma/issues/164
https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2
https://github.com/tarantula-team/CVE-2019-19012
https://lists.debian.org/debian-lts-announce/2019/12/msg00002.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V/

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