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.
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
Source: MITRE
Published: 2019-11-17
Updated: 2020-08-24
Type: CWE-190
Base Score: 7.5
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 10
Severity: HIGH
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL