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Fencer Intel
critical 9.8

CVE-2019-9023 in the critical feed json

An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1.

published 7y ago modified 4mo ago also EUVD-2019-18410

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.3%
EPSS 9.3% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. A number of heap-based buffer over-read instances are present in mbstring regular expression functions when supplied with invalid multibyte data. These occur in ext/mbstring/oniguruma/regcomp.c, ext/mbstring/oniguruma/regexec.c, ext/mbstring/oniguruma/regparse.c, ext/mbstring/oniguruma/enc/unicode.c, and ext/mbstring/oniguruma/src/utf32_be.c when a multibyte regular expression pattern contains invalid multibyte sequences.

Patch / fix

  • php php 5.6.40, 7.1.26, 7.2.14, 7.3.1
  • php5 Ubuntu 14.04 LTS 5.5.9+dfsg-1ubuntu4.27
  • php7.0 Ubuntu 16.04 LTS 7.0.33-0ubuntu0.16.04.2
  • php7.2 Ubuntu 18.04 LTS 7.2.15-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2019-9023

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

  • php RHEL 8 7.2.24-1.module+el8.2.0+4601+7c76a223
  • libzip RHEL 8 1.5.1-2.module+el8.1.0+3202+af5476b9
  • php-gd RHEL 8 7.2.24-1.module+el8.2.0+4601+7c76a223
  • php-cli RHEL 8 7.2.24-1.module+el8.2.0+4601+7c76a223
  • php-dba RHEL 8 7.2.24-1.module+el8.2.0+4601+7c76a223
  • php-dbg RHEL 8 7.2.24-1.module+el8.2.0+4601+7c76a223
  • php-fpm RHEL 8 7.2.24-1.module+el8.2.0+4601+7c76a223
  • php-gmp RHEL 8 7.2.24-1.module+el8.2.0+4601+7c76a223

red hat advisories RHSA-2020:1624RHSA-2019:3299RHSA-2019:2519

  • php7 SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +8 more 7.2.34-150000.4.103.1
  • php7 SLE Module for Web and Scripting 15, SLE Module for Package Hub 15 7.2.5-4.32.1
  • php5 SLE Software Development Kit 12 SP4, SLE Software Development Kit 12 SP3, SLE Module for Web and Scripting 12 5.5.14-109.51.6
  • php53 SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 +1 more 5.3.17-112.58.1
  • php72 SLE Software Development Kit 12 SP4, SLE Software Development Kit 12 SP3, SLE Module for Web and Scripting 12 7.2.5-1.7.1
  • tidy SLE Software Development Kit 12 SP4, SLE Software Development Kit 12 SP3, SLE Module for Web and Scripting 12 1.0.20100204cvs-26.2.1
  • libmemcached SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4 +3 more 1.0.18-3.2.1
  • php72-memcached SLE Module for Web and Scripting 12 3.1.3-1.3.1

suse advisories SUSE-SU-2022:4067-1SUSE-SU-2019:1461-1SUSE-SU-2019:0985-1SUSE-SU-2019:14013-1SUSE-RU-2019:0823-1

  • php7 openSUSE Tumbleweed 7.4.24-1.1
  • php8 openSUSE Tumbleweed 8.0.11-1.1
  • php7 openSUSE Leap 15.0 7.2.5-lp150.2.19.1
  • php7 openSUSE Leap 15.1 7.2.5-lp151.6.3.1

opensuse advisories openSUSE-SU-2024:11167-1openSUSE-SU-2024:11169-1openSUSE-SU-2019:1573-1openSUSE-SU-2019:1572-1

  • php AlmaLinux 8 7.2.24-1.module_el8.3.0+2010+7c76a223
  • php AlmaLinux 8 7.2.24-1.module_el8.4.0+2228+7c76a223
  • php AlmaLinux 8 7.2.24-1.module_el8.5.0+53+9945c2af
  • libzip AlmaLinux 8 1.5.1-2.module_el8.3.0+2010+7c76a223
  • libzip AlmaLinux 8 1.5.1-2.module_el8.4.0+2228+7c76a223
  • libzip AlmaLinux 8 1.5.1-2.module_el8.5.0+53+9945c2af
  • php-gd AlmaLinux 8 7.2.24-1.module_el8.5.0+53+9945c2af
  • php-gd AlmaLinux 8 7.2.24-1.module_el8.3.0+2010+7c76a223

almalinux advisories ALSA-2020:1624

  • php Rocky Linux 8 7.2.24-1.module+el8.4.0+413+c9202dda
  • libzip Rocky Linux 8 1.5.1-2.module+el8.4.0+413+c9202dda
  • php-pear Rocky Linux 8 1:1.10.5-9.module+el8.4.0+413+c9202dda
  • php-pecl-zip Rocky Linux 8 1.15.3-1.module+el8.4.0+413+c9202dda
  • php-pecl-apcu Rocky Linux 8 5.1.12-2.module+el8.4.0+413+c9202dda

rocky linux advisories RLSA-2020:1624

  • php7 Alpine 3.15, Alpine 3.14, Alpine 3.13 +4 more 7.2.14-r0
  • php7 Alpine 3.8 7.2.17-r0

alpine advisories ALPINE-CVE-2019-9023

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2019-9023 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-2019-9023 updated cvss 5.4

php: Heap-based buffer over-read in mbstring regular expression functions

  • Red Hat Enterprise Linux 5 php Red Hat Enterprise Linux 6 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +20 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +18 more Red Hat Software Collections rh-php70-php, rh-php70-php-gd, rh-php70-php-cli, rh-php70-php-dba, rh-php70-php-dbg, rh-php70-php-fpm, +24 more
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 8) php 7.2.24-1.module+el8.2.0+4601+7c76a223, libzip 1.5.1-2.module+el8.1.0+3202+af5476b9, php-gd 7.2.24-1.module+el8.2.0+4601+7c76a223, php-cli 7.2.24-1.module+el8.2.0+4601+7c76a223, php-dba 7.2.24-1.module+el8.2.0+4601+7c76a223, php-dbg 7.2.24-1.module+el8.2.0+4601+7c76a223, +26 more
    fixed: vendor fix RHSA-2020:1624
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-php71-php 7.1.30-1.el7, rh-php72-php 7.2.24-1.el7, rh-php71-php-gd 7.1.30-1.el7, rh-php72-php-gd 7.2.24-1.el7, rh-php71-php-cli 7.1.30-1.el7, rh-php71-php-dba 7.1.30-1.el7, +50 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-php71-php 7.1.30-1.el7, rh-php71-php-gd 7.1.30-1.el7, rh-php71-php-cli 7.1.30-1.el7, rh-php71-php-dba 7.1.30-1.el7, rh-php71-php-dbg 7.1.30-1.el7, rh-php71-php-fpm 7.1.30-1.el7, +22 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-php71-php 7.1.30-1.el7, rh-php72-php 7.2.24-1.el7, rh-php71-php-gd 7.1.30-1.el7, rh-php72-php-gd 7.2.24-1.el7, rh-php71-php-cli 7.1.30-1.el7, rh-php71-php-dba 7.1.30-1.el7, +50 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-php71-php 7.1.30-1.el7, rh-php72-php 7.2.24-1.el7, rh-php71-php-gd 7.1.30-1.el7, rh-php72-php-gd 7.2.24-1.el7, rh-php71-php-cli 7.1.30-1.el7, rh-php71-php-dba 7.1.30-1.el7, +50 more
    fixed: vendor fix RHSA-2019:2519
  • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-php72-php 7.2.24-1.el7, rh-php72-php-gd 7.2.24-1.el7, rh-php72-php-cli 7.2.24-1.el7, rh-php72-php-dba 7.2.24-1.el7, rh-php72-php-dbg 7.2.24-1.el7, rh-php72-php-fpm 7.2.24-1.el7, +22 more
    fixed: vendor fix RHSA-2019:3299
  • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-php71-php 7.1.30-1.el7, rh-php72-php 7.2.24-1.el7, rh-php71-php-gd 7.1.30-1.el7, rh-php72-php-gd 7.2.24-1.el7, rh-php71-php-cli 7.1.30-1.el7, rh-php71-php-dba 7.1.30-1.el7, +50 more
    fixed: vendor fix RHSA-2019:2519

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

cisa ICSA-26-027-02 updated cvss 9.8

Festo Didactic SE MES PC

  • Festo Didactic SE MES PC shipped_with_Windows_10
    affected: vendor fix

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

9.32% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.php.net https://bugs.php.net/bug.php?id=77382 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.php.net https://bugs.php.net/bug.php?id=77418 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.php.net https://bugs.php.net/bug.php?id=77371 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.php.net https://bugs.php.net/bug.php?id=77370 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.php.net https://bugs.php.net/bug.php?id=77385 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.php.net https://bugs.php.net/bug.php?id=77394 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.php.net https://bugs.php.net/bug.php?id=77381 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
Technology feeds

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.