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Fencer Vulns
high 7.5

CVE-2024-8927 json

cgi.force_redirect configuration is bypassable due to the environment variable collision

published 2024-09-27 2 y ago modified 2026-09-08 2 mo ago also BIT-libphp-2024-8927 , BIT-php-2024-8927 , BIT-php-min-2024-8927 , EUVD-2024-49490 , GHSA-94p6-54jq-9mwp

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

In PHP versions 8.1.* before 8.1.30, 8.2.* before 8.2.24, 8.3.* before 8.3.12, HTTP_REDIRECT_STATUS variable is used to check whether or not CGI binary is being run by the HTTP server. However, in certain scenarios, the content of this variable can be controlled by the request submitter via HTTP headers, which can lead to cgi.force_redirect option not being correctly applied. In certain configurations this may lead to arbitrary file inclusion in PHP.

Patch / fix

  • bitnami libphp 8.1.30, 8.2.24, 8.3.12
  • bitnami php 8.1.30, 8.2.24, 8.3.12
  • bitnami php-min 8.1.30, 8.2.24, 8.3.12
  • PHP Group PHP 8.1.30, 8.2.24, 8.3.12
  • php php 8.1.30, 8.2.24, 8.3.12
  • php8.2 Debian 12 8.2.24-1~deb12u1

debian advisories DEBIAN-CVE-2024-8927

  • php7.4 Ubuntu 20.04 LTS 7.4.3-4ubuntu2.24
  • php8.1 Ubuntu 22.04 LTS 8.1.2-1ubuntu2.19
  • php8.3 Ubuntu 24.04 LTS 8.3.6-0ubuntu0.24.04.2
  • php5 Ubuntu Pro 14.04 LTS 5.5.9+dfsg-1ubuntu4.29+esm16
  • php7.0 Ubuntu Pro 16.04 LTS 7.0.33-0ubuntu0.16.04.16+esm12
  • php7.2 Ubuntu Pro 18.04 LTS 7.2.24-0ubuntu0.18.04.17+esm6

ubuntu advisories UBUNTU-CVE-2024-8927

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 9 8.0.30-2.el9
  • php-gd RHEL 9 8.0.30-2.el9
  • php-cli RHEL 9 8.0.30-2.el9
  • php-dba RHEL 9 8.0.30-2.el9
  • php-dbg RHEL 9 8.0.30-2.el9
  • php-ffi RHEL 9 8.0.30-2.el9
  • php-fpm RHEL 9 8.0.30-2.el9
  • php-gmp RHEL 9 8.0.30-2.el9

red hat advisories RHSA-2025:7315RHSA-2024:10951RHSA-2024:10952RHSA-2024:10950RHSA-2024:10949

  • php7 SLE Module for Legacy 15 SP6, SLE Module for Legacy 15 SP5, openSUSE Leap 15.6 +1 more 7.4.33-150400.4.40.1
  • php7-fpm SLE Module for Legacy 15 SP6, SLE Module for Legacy 15 SP5, openSUSE Leap 15.6 +1 more 7.4.33-150400.4.40.1
  • php7-test openSUSE Leap 15.6, openSUSE Leap 15.5 7.4.33-150400.4.40.1
  • php7-embed SLE Module for Package Hub 15 SP6, SLE Module for Package Hub 15 SP5, openSUSE Leap 15.6 +1 more 7.4.33-150400.4.40.1
  • php7-fastcgi SLE Module for Legacy 15 SP6, SLE Module for Legacy 15 SP5, openSUSE Leap 15.6 +1 more 7.4.33-150400.4.40.1
  • apache2-mod_php7 SLE Module for Legacy 15 SP6, SLE Module for Legacy 15 SP5, openSUSE Leap 15.6 +1 more 7.4.33-150400.4.40.1
  • php74 SLE Software Development Kit 12 SP5, SLE Module for Web and Scripting 12 7.4.33-1.71.1
  • php8 SLE Module for Web and Scripting 15 SP6, openSUSE Leap 15.6 8.2.24-150600.3.6.1

suse advisories SUSE-SU-2024:3733-1SUSE-SU-2024:3732-1SUSE-SU-2024:3729-1SUSE-SU-2024:3664-1

  • php8 openSUSE Tumbleweed 8.3.12-1.1

opensuse advisories openSUSE-SU-2024:14376-1

  • php AlmaLinux 9 8.2.25-1.module_el9.5.0+132+adb0ae7a
  • php-gd AlmaLinux 9 8.2.25-1.module_el9.5.0+132+adb0ae7a
  • php-cli AlmaLinux 9 8.2.25-1.module_el9.5.0+132+adb0ae7a
  • php-dba AlmaLinux 9 8.2.25-1.module_el9.5.0+132+adb0ae7a
  • php-dbg AlmaLinux 9 8.2.25-1.module_el9.5.0+132+adb0ae7a
  • php-ffi AlmaLinux 9 8.2.25-1.module_el9.5.0+132+adb0ae7a
  • php-fpm AlmaLinux 9 8.2.25-1.module_el9.5.0+132+adb0ae7a
  • php-gmp AlmaLinux 9 8.2.25-1.module_el9.5.0+132+adb0ae7a

almalinux advisories ALSA-2024:10949ALSA-2024:10950ALSA-2024:10951ALSA-2024:10952

  • php-pecl-rrd Rocky Linux 9 2.0.3-4.module+el9.6.0+32040+1f1dedb8
  • php-pecl-rrd Rocky Linux 9 2.0.3-4.module+el9.6.0+32041+66e66fb7
  • php-pecl-rrd Rocky Linux 9 2.0.3-4.module+el9.6.0+32042+808943ae
  • php-pecl-zip Rocky Linux 9 1.22.3-1.module+el9.6.0+32041+66e66fb7
  • php-pecl-zip Rocky Linux 9 1.22.3-1.module+el9.6.0+32042+808943ae
  • php-pecl-apcu Rocky Linux 9 5.1.23-1.module+el9.6.0+32041+66e66fb7
  • php-pecl-apcu Rocky Linux 9 5.1.23-1.module+el9.6.0+32042+808943ae
  • php-pecl-xdebug3 Rocky Linux 9 3.2.2-2.module+el9.6.0+32041+66e66fb7

rocky linux advisories RLSA-2024:10949RLSA-2024:10950RLSA-2024:10951RLSA-2024:10952

  • php81 Alpine 3.19 8.1.30-r0
  • php82 Alpine 3.20 8.2.24-r0
  • php83 Alpine 3.20 8.3.12-r0

alpine advisories ALPINE-CVE-2024-8927

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

  • php CBL-Mariner 2.0 8.1.30-1
  • php Azure Linux 3.0 8.3.12-1

azure linux advisories AZL-50132AZL-50164

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2024-8927 updated cvss 7.5

php: cgi.force_redirect configuration is bypassable due to the environment variable collision

  • Red Hat Enterprise Linux 7 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +18 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 php, libzip, php-gd, php-cli, php-dba, php-dbg, +30 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) php 7.4.33-2.module+el8.10.0+22485+a3539972, php 8.2.25-1.module+el8.10.0+22478+9eb07224, libzip 1.6.1-1.module+el8.10.0+22485+a3539972, libzip 1.7.3-1.module+el8.10.0+20770+a5eca186, php-gd 7.4.33-2.module+el8.10.0+22485+a3539972, php-gd 8.2.25-1.module+el8.10.0+22478+9eb07224, +60 more
    fixed: vendor fix RHSA-2024:10952
  • Red Hat Enterprise Linux AppStream (v. 9) php 8.0.30-2.el9, php-gd 8.0.30-2.el9, php-cli 8.0.30-2.el9, php-dba 8.0.30-2.el9, php-dbg 8.0.30-2.el9, php-ffi 8.0.30-2.el9, +76 more
    fixed: vendor fix RHSA-2024:10950
  • Red Hat Enterprise Linux 10 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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.05% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/php/php-src/security/advisories/GHSA-94p6-54jq-9mwp referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
bitnami libphp
<8.1.30
>=8.2.0, <8.2.24
>=8.3.0, <8.3.12
8.1.30
8.2.24
8.3.12
bitnami php
<8.1.30
>=8.2.0, <8.2.24
>=8.3.0, <8.3.12
8.1.30
8.2.24
8.3.12
bitnami php-min
<8.1.30
>=8.2.0, <8.2.24
>=8.3.0, <8.3.12
8.1.30
8.2.24
8.3.12

Affected products

  • PHP Group PHP
  • php php

Classification

Weakness
  • CWE-1220 Insufficient Granularity of Access Control
Technology feeds

References

Sources

Fencer Vulns 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.

The maintainers of php/php-src published their own advisory on GitHub. Reviewed sources take precedence over it.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.