THREATPORT/VULNERABILITY/CVE-2019-13224
CRITICAL SEVERITY

CVE-2019-13224

Oniguruma vulnerability

CVSS
9.8
EPSS
4.0%
EPSS pct
90th
Exploited
No known
A use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial of service, or possibly code execution by providing a crafted regular expression. The attacker provides a pair of a regex pattern and a string, with a multi-byte encoding that gets handled by onig_new_deluxe(). Oniguruma issues often affect Ruby, as well as common optional libraries for PHP and Rust.
Affected vendor
Oniguruma Project
Affected product
Oniguruma
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2019-07-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 4.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2019-13224

  • Confirm whether Oniguruma Project Oniguruma is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-13224.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-13224

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-13224 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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