CVE intelligence and bounded remediation

CVE-2019-19012 — Oniguruma Project Oniguruma security vulnerability

Critical CVSS 9.8

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.

Severity
Critical
CVSS
9.8 (3.1)
Published
2019-11-17
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-125, CWE-190

Affected products

  • oniguruma_project / oniguruma
  • oniguruma_project / oniguruma / 6.9.4
  • debian / debian_linux / 8.0
  • fedoraproject / fedora / 30
  • fedoraproject / fedora / 31
  • redhat / enterprise_linux / 8.0

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
  • Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
  • Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

  • Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
  • Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
  • Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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