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Fencer Intel
high 7.5

CVE-2019-19203 json

An issue was discovered in Oniguruma 6.x before 6.9.4_rc2.

published 6y ago modified 4mo ago also EUVD-2019-8835

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.1%
EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

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.

Patch / fix

  • oniguruma_project oniguruma 6.9.4
  • libonig Debian 14, Debian 13, Debian 12 6.9.4-1

debian advisories DEBIAN-CVE-2019-19203

  • libonig Ubuntu Pro 14.04 LTS 5.9.1-1ubuntu1.1+esm3
  • libonig Ubuntu Pro 16.04 LTS 5.9.6-1ubuntu0.1+esm3
  • libonig Ubuntu Pro 18.04 LTS 6.7.0-1ubuntu0.1~esm2

ubuntu advisories UBUNTU-CVE-2019-19203

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • oniguruma RHEL 8 6.8.2-2.1.el8_9
  • php RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • libzip RHEL 8 1.5.2-1.module+el8.1.0+3189+a1bff096
  • php-gd RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-cli RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-dba RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-dbg RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-fpm RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef

red hat advisories RHSA-2024:0889RHSA-2024:0572RHSA-2024:0409RHSA-2020:3662RHSA-2020:5275

  • oniguruma SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES 15 SP2-LTSS +19 more 6.7.0-150000.3.3.1

suse advisories SUSE-SU-2022:3327-1

  • oniguruma openSUSE Tumbleweed 6.9.7.1-1.2

opensuse advisories openSUSE-SU-2024:11111-1

  • oniguruma AlmaLinux 8 6.8.2-2.1.el8_9
  • php AlmaLinux 8 7.3.20-1.module_el8.4.0+2229+b272fdef
  • php AlmaLinux 8 7.3.20-1.module_el8.5.0+152+112d3b8c
  • php AlmaLinux 8 7.3.20-1.module_el8.3.0+2009+b272fdef
  • libzip AlmaLinux 8 1.5.2-1.module_el8.5.0+152+112d3b8c
  • libzip AlmaLinux 8 1.5.2-1.module_el8.3.0+2009+b272fdef
  • libzip AlmaLinux 8 1.5.2-1.module_el8.4.0+2229+b272fdef
  • php-gd AlmaLinux 8 7.3.20-1.module_el8.4.0+2229+b272fdef

almalinux advisories ALSA-2024:0889ALSA-2020:3662

  • php Rocky Linux 8 7.3.20-1.module+el8.4.0+414+2e7afcdd
  • libzip Rocky Linux 8 1.5.2-1.module+el8.4.0+414+2e7afcdd
  • php-pear Rocky Linux 8 1:1.10.9-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-rrd Rocky Linux 8 2.0.1-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-zip Rocky Linux 8 1.15.4-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-apcu Rocky Linux 8 5.1.17-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-xdebug Rocky Linux 8 2.8.0-1.module+el8.4.0+414+2e7afcdd

rocky linux advisories RLSA-2020:3662

Is CVE-2019-19203 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-19203 updated cvss 7.5

oniguruma: Heap-based buffer over-read in function gb18030_mbc_enc_len in file gb18030.c

  • Red Hat Enterprise Linux 5 php53 Red Hat Enterprise Linux 6 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +21 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 php, ruby, php-gd, php-cli, php-dba, php-fpm, +30 more Red Hat Enterprise Linux 8 php, ruby, libzip, php-gd, php-cli, php-dba, +61 more
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 4 oniguruma
    affected: no fix planned “Will not fix”
  • Red Hat Software Collections rh-php72-php, rh-ruby24-ruby, rh-ruby25-ruby, rh-ruby26-ruby, rh-php72-php-gd, rh-php72-php-cli, +74 more
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder (v. 8) oniguruma-devel 6.8.2-2.1.el8_9, oniguruma-debuginfo 6.8.2-2.1.el8_9, oniguruma-debugsource 6.8.2-2.1.el8_9
    fixed: vendor fix RHSA-2024:0889
  • Red Hat CodeReady Linux Builder EUS (v.8.6) oniguruma-devel 6.8.2-2.1.el8_6, oniguruma-debuginfo 6.8.2-2.1.el8_6, oniguruma-debugsource 6.8.2-2.1.el8_6
    fixed: vendor fix RHSA-2024:0409
  • Red Hat CodeReady Linux Builder EUS (v.8.8) oniguruma-devel 6.8.2-2.1.el8_8, oniguruma-debuginfo 6.8.2-2.1.el8_8, oniguruma-debugsource 6.8.2-2.1.el8_8
    fixed: vendor fix RHSA-2024:0572
  • Red Hat Enterprise Linux AppStream (v. 8) oniguruma 6.8.2-2.1.el8_9, php 7.3.20-1.module+el8.2.0+7373+b272fdef, libzip 1.5.2-1.module+el8.1.0+3189+a1bff096, php-gd 7.3.20-1.module+el8.2.0+7373+b272fdef, php-cli 7.3.20-1.module+el8.2.0+7373+b272fdef, php-dba 7.3.20-1.module+el8.2.0+7373+b272fdef, +29 more
    fixed: vendor fix RHSA-2020:3662
show 4 more
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) oniguruma 6.8.2-2.1.el8_6
    fixed: vendor fix RHSA-2024:0409
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) oniguruma 6.8.2-2.1.el8_8
    fixed: vendor fix RHSA-2024:0572
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-php73-php 7.3.20-1.el7, rh-php73-php-gd 7.3.20-1.el7, rh-php73-php-cli 7.3.20-1.el7, rh-php73-php-dba 7.3.20-1.el7, rh-php73-php-dbg 7.3.20-1.el7, rh-php73-php-fpm 7.3.20-1.el7, +22 more 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-gd 7.3.20-1.el7, rh-php73-php-cli 7.3.20-1.el7, rh-php73-php-dba 7.3.20-1.el7, rh-php73-php-dbg 7.3.20-1.el7, rh-php73-php-fpm 7.3.20-1.el7, +22 more 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-gd 7.3.20-1.el7, rh-php73-php-cli 7.3.20-1.el7, rh-php73-php-dba 7.3.20-1.el7, rh-php73-php-dbg 7.3.20-1.el7, rh-php73-php-fpm 7.3.20-1.el7, +22 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-php73-php 7.3.20-1.el7, rh-php73-php-gd 7.3.20-1.el7, rh-php73-php-cli 7.3.20-1.el7, rh-php73-php-dba 7.3.20-1.el7, rh-php73-php-dbg 7.3.20-1.el7, rh-php73-php-fpm 7.3.20-1.el7, +22 more
    fixed: vendor fix RHSA-2020:5275
  • Red Hat Enterprise Linux 5 php
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.05% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/kkos/oniguruma/issues/163 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/ManhNDd/CVE-2019-19203 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.