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TI-2021-04782 Aliases CVE-2021-21702GHSA-5hg4-wc97-mw4m

Null Dereference in SoapClient

Priority LOW 39CWE-476Published · 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: 4 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

In PHP versions 7.3.x below 7.3.27, 7.4.x below 7.4.15 and 8.0.x below 8.0.2, when using SOAP extension to connect to a SOAP server, a malicious SOAP server could return malformed XML data as a response that would cause PHP to access a null pointer and thus cause a crash.

Why it matters now

EPSS 0.03152 88th percentileScored 2026-11-07
Fix Partial PHP (PHP Group): 7.3.27, 7.4.15, 8.0.2Red Hat: 2 advisoriesRed Hat: 4 fixed, 4 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
PHP GroupPHP7.3.x to before 7.3.27; 7.4.x to before 7.4.15; 8.0.X to before 8.0.27.3.27, 7.4.15, 8.0.2Patch availableCNA
  • PHP VendorPHP Group Affected 7.3.x to before 7.3.27; 7.4.x to before 7.4.15; 8.0.X to before 8.0.2 Fixed in 7.3.27, 7.4.15, 8.0.2 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*7.3.0 to before 7.3.27; 7.4.0 to before 7.4.15; 8.0.0 to before 8.0.2VulnerablePHP
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*8.0.0 – 8.5.0VulnerableOracle
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions 7.3.0 to before 7.3.27; 7.4.0 to before 7.4.15; 8.0.0 to before 8.0.2 Vulnerable ·PHP
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:* Versions 8.0.0 – 8.5.0 Vulnerable ·Oracle

Remediation

  • Fix · CNA PHP (PHP Group) Fixed in 7.3.27, 7.4.15, 8.0.2

Red Hat 2 advisories

  • RHSA-2021:4213 Released 2021-11-09 · Red Hat rating Moderate
    php:7.4 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) apcu-panel-5.1.18-1.module+el8.3.0+6678+b09f589e.noarch::php:7.4, libzip-1.6.1-1.module+el8.3.0+6678+b09f589e.aarch64::php:7.4, libzip-1.6.1-1.module+el8.3.0+6678+b09f589e.ppc64le::php:7.4 +47
  • RHSA-2021:2992 Released 2021-08-03 · Red Hat rating Moderate
    rh-php73-php security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-php73-php-7.3.29-1.el7, rh-php73-php-bcmath-7.3.29-1.el7, rh-php73-php-cli-7.3.29-1.el7 +26
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-php73-php-7.3.29-1.el7, rh-php73-php-bcmath-7.3.29-1.el7, rh-php73-php-cli-7.3.29-1.el7 +26
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-php73-php-7.3.29-1.el7, rh-php73-php-bcmath-7.3.29-1.el7, rh-php73-php-cli-7.3.29-1.el7 +26

Fixed in the same release

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

  • Advisory ·

    PHP — GLSA-202105-23

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2020-05710 FILTER_VALIDATE_URL accepts URLs with invalid userinfoPriority LOW 29
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:4213
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:2992
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2021:2992
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:2992
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21702
  2. 2026-10-03 Alias added: GHSA-5hg4-wc97-mw4m

References

Patch 1

Advisory 6

  • 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