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TI-2023-03572 Aliases CVE-2023-3823

Security issue with external entity loading in XML without enabling it

Priority MEDIUM 41CWE-611Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · Low · Low
Fix status
Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded. This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down.

Why it matters now

EPSS 0.0164 76th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial PHP (PHP Group): 8.0.30, 8.1.22, 8.2.8Red Hat: 4 advisoriesRed Hat: 2 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
PHP GroupPHPbefore 8.0.30; before 8.1.22; before 8.2.88.0.30, 8.1.22, 8.2.8Patch availableCNA
  • PHP VendorPHP Group Affected before 8.0.30; before 8.1.22; before 8.2.8 Fixed in 8.0.30, 8.1.22, 8.2.8 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*8.0.0 to before 8.0.30; 8.1.0 to before 8.1.22; 8.2.0 to before 8.2.9VulnerablePHP
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*38VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.30; 8.1.0 to before 8.1.22; 8.2.0 to before 8.2.9 Vulnerable ·PHP
  • cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA PHP (PHP Group) Fixed in 8.0.30, 8.1.22, 8.2.8

Red Hat 4 advisories

  • RHSA-2024:10952 Released 2024-12-11 · Red Hat rating Moderate
    php:7.4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) apcu-panel-5.1.18-1.module+el8.10.0+22485+a3539972.noarch::php:7.4, libzip-1.6.1-1.module+el8.10.0+22485+a3539972.aarch64::php:7.4, libzip-1.6.1-1.module+el8.10.0+22485+a3539972.ppc64le::php:7.4 +47
  • RHSA-2024:0387 Released 2024-01-24 · Red Hat rating Moderate
    php:8.1 security update
    • Red Hat Enterprise Linux AppStream (v. 9) apcu-panel-5.1.21-1.module+el9.1.0.z+15477+cb86791d.noarch::php:8.1, php-8.1.27-1.module+el9.3.0.z+21063+f4ccb976.aarch64::php:8.1, php-8.1.27-1.module+el9.3.0.z+21063+f4ccb976.ppc64le::php:8.1 +47
  • RHSA-2023:5927 Released 2023-10-19 · Red Hat rating Important
    php:8.0 security update
    • Red Hat Enterprise Linux AppStream (v. 8) apcu-panel-5.1.20-1.module+el8.6.0+13671+84712317.noarch::php:8.0, libzip-1.7.3-1.module+el8.6.0+13671+84712317.aarch64::php:8.0, libzip-1.7.3-1.module+el8.6.0+13671+84712317.ppc64le::php:8.0 +47
Show 1 more Red Hat advisories
  • RHSA-2023:5926 Released 2023-10-19 · Red Hat rating Important
    php security update
    • Red Hat Enterprise Linux AppStream (v. 9) php-8.0.30-1.el9_2, php-bcmath-8.0.30-1.el9_2, php-cli-8.0.30-1.el9_2 +22

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    PHP 8.0.30, 8.1.22, 8.2.8

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2023-03573 Buffer overflow and overread in phar_dir_read()Priority MEDIUM 62
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Software CollectionsAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:5927, RHSA-2024:10952
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:5926, RHSA-2024:0387
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat OpenShift Dev Spaces

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-3823

References

Exploit 1

Advisory 1

Other 2

  • TI-2024-04260 Argument Injection in PHP-CGI KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-78794 PHP remote code execution via stale global state KEVCVSS 4.0CRITICAL 9.2
  • TI-2026-78793 Out-of-memory handling flaw in PHP allows remote code execution KEVCVSS 4.0CRITICAL 9.2
  • TI-2024-01743 Command injection via array-ish $command parameter of proc_open() CVSS 3.1CRITICAL 9.4
  • TI-2022-13555 PDO::quote() may return unquoted string CVSS 3.1CRITICAL 9.1
  • TI-2024-10408 Reference counting in php_request_shutdown causes Use-After-Free CVSS 4.0CRITICAL 9.2
See all 107 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences