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CVE-2019-19204

27
FAUCET Score

CVE-2019-19204 is a heap-based buffer over-read vulnerability in Oniguruma 6.x before 6.9.4_rc2, specifically within the fetch_interval_quantifier function, affecting various Debian and Fedora distributions. Rated 7.5 HIGH, this vulnerability can be exploited remotely with low attack complexity, potentially leading to a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.0.0, < 6.9.4CPE matchmatch criteria
cpe:2.3:a:oniguruma_project:oniguruma:*:*:*:*:*:*:*:*
6.9.4CPE matchmatch criteria
cpe:2.3:a:oniguruma_project:oniguruma:6.9.4:rc1:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
30CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
31CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
6.89%
Probability of exploitation in next 30 days
EPSS Percentile
93.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0689 is in the 89th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: php:7.3-8020020200715124551.ceb1cf90
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: oniguruma-0:6.8.2-2.1.el8_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: oniguruma-0:6.8.2-2.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: oniguruma-0:6.8.2-2.1.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php73-php-0:7.3.20-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-php73-php-0:7.3.20-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-php73-php-0:7.3.20-1.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: php:7.2/php
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: oniguruma
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php72-php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-ruby24-ruby

Vendor Advisories (1)

redhatCVE-2019-19204Moderate

oniguruma: Heap-based buffer over-read in function fetch_interval_quantifier in regparse.c

Nov 6, 2019

References

github.com / kkos/oniguruma/issues/162
ExploitPatchThird Party Advisory
github.com / kkos/oniguruma/releases/tag/v6.9.4_rc2
Release Notes
github.com / ManhNDd/CVE-2019-19204
ExploitThird Party Advisory
github.com / tarantula-team/CVE-2019-19204
Third Party Advisory
lists.debian.org / debian-lts-announce/2019/12/msg00002.html
Third Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/V3MBNW6Z4DOXSCNWGBLQ7OA3OGUJ44WL
usn.ubuntu.com / 4460-1