An issue was discovered in Oniguruma 6.x before 6.9.4_rc2.
Priority MEDIUM 40CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 10 fixed, 6 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.
Summary
An issue was discovered in Oniguruma 6.x before 6.9.4_rc2. In the function gb18030_mbc_enc_len in file gb18030.c, a UChar pointer is dereferenced without checking if it passed the end of the matched string. This leads to a heap-based buffer over-read.
Why it matters now
EPSS 0.04052 90th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial Red Hat: 5 advisoriesRed Hat: 10 fixed, 6 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:oniguruma_project:oniguruma:*:*:*:*:*:*:*:* | 6.0.0 to before 6.9.4 | Vulnerable | Oniguruma Project |
| cpe:2.3:a:oniguruma_project:oniguruma:6.9.4:rc1:*:*:*:*:*:* | 6.9.4 rc1 | Vulnerable | Oniguruma Project |
| cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* | 30 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
- cpe:2.3:a:oniguruma_project:oniguruma:*:*:*:*:*:*:*:* Versions 6.0.0 to before 6.9.4 Vulnerable ·Oniguruma Project
- cpe:2.3:a:oniguruma_project:oniguruma:6.9.4:rc1:*:*:*:*:*:* Versions 6.9.4 rc1 Vulnerable ·Oniguruma Project
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
Remediation
Red Hat 5 advisories
- RHSA-2024:0889 Released 2024-02-20 · Red Hat rating Moderateoniguruma security update
- Red Hat CodeReady Linux Builder (v. 8) oniguruma-devel-6.8.2-2.1.el8_9
- Red Hat Enterprise Linux AppStream (v. 8) oniguruma-6.8.2-2.1.el8_9
- RHSA-2024:0572 Released 2024-01-30 · Red Hat rating Moderateoniguruma security update
- Red Hat CodeReady Linux Builder EUS (v.8.8) oniguruma-devel-6.8.2-2.1.el8_8
- Red Hat Enterprise Linux AppStream EUS (v.8.8) oniguruma-6.8.2-2.1.el8_8
- RHSA-2024:0409 Released 2024-01-25 · Red Hat rating Moderateoniguruma security update
- Red Hat CodeReady Linux Builder EUS (v.8.6) oniguruma-devel-6.8.2-2.1.el8_6
- Red Hat Enterprise Linux AppStream EUS (v.8.6) oniguruma-6.8.2-2.1.el8_6
Show 2 more Red Hat advisories
- RHSA-2020:5275 Released 2020-12-01 · Red Hat rating Moderaterh-php73-php security, bug fix, and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-php73-php-7.3.20-1.el7, rh-php73-php-bcmath-7.3.20-1.el7, rh-php73-php-cli-7.3.20-1.el7 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-php73-php-7.3.20-1.el7, rh-php73-php-bcmath-7.3.20-1.el7, rh-php73-php-cli-7.3.20-1.el7 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-php73-php-7.3.20-1.el7, rh-php73-php-bcmath-7.3.20-1.el7, rh-php73-php-cli-7.3.20-1.el7 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-php73-php-7.3.20-1.el7, rh-php73-php-bcmath-7.3.20-1.el7, rh-php73-php-cli-7.3.20-1.el7 +26
- RHSA-2020:3662 Released 2020-09-08 · Red Hat rating Moderatephp:7.3 security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 8) apcu-panel-5.1.17-1.module+el8.1.0+3189+a1bff096.noarch::php:7.3, libzip-1.5.2-1.module+el8.1.0+3189+a1bff096.aarch64::php:7.3, libzip-1.5.2-1.module+el8.1.0+3189+a1bff096.ppc64le::php:7.3 +47
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix planned: Will not fix |
| Red Hat Software Collections | Affected | No fix yet: Fix deferred |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2024:0889 |
| Red Hat CodeReady Linux Builder EUS (v.8.6) | Fixed | RHSA-2024:0409 |
| Red Hat CodeReady Linux Builder EUS (v.8.8) | Fixed | RHSA-2024:0572 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2020:3662, RHSA-2024:0889 |
| Red Hat Enterprise Linux AppStream EUS (v.8.6) | Fixed | RHSA-2024:0409 |
| Red Hat Enterprise Linux AppStream EUS (v.8.8) | Fixed | RHSA-2024:0572 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:5275 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) | Fixed | RHSA-2020:5275 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) | Fixed | RHSA-2020:5275 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:5275 |
Not affected: 1 product
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2019-19203
- 2026-10-03 Alias added: GHSA-ggp4-f63c-mcc4
References
Sources
- CVE-2019-19203 · CVE Program
- CVE-2019-19203 · NVD
- FIRST EPSS
- GHSA-ggp4-f63c-mcc4 · GitHub Advisory Database · CC BY 4.0
- CVE-2019-19203 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences