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Fencer Vulns
critical 9.4

CVE-2023-3824 in the critical feed json

Buffer overflow and overread in phar_dir_read()

published 2023-08-05 3 y ago modified 2026-09-08 2 mo ago also BIT-libphp-2023-3824 , BIT-php-2023-3824 , BIT-php-min-2023-3824 , EUVD-2023-44452 , GHSA-jqcx-ccgc-xwhv

cvss
9.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
21.8%
EPSS 21.8% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

In PHP version 8.0.* before 8.0.30,  8.1.* before 8.1.22, and 8.2.* before 8.2.8, when loading phar file, while reading PHAR directory entries, insufficient length checking may lead to a stack buffer overflow, leading potentially to memory corruption or RCE.

Patch / fix

  • bitnami libphp 8.0.30, 8.1.22, 8.2.9
  • bitnami php 8.0.30, 8.1.22, 8.2.9
  • bitnami php-min 8.0.30, 8.1.22, 8.2.9
  • PHP Group PHP 8.0.30, 8.1.22, 8.2.8
  • php8.2 Debian 12 8.2.18-1~deb12u1

debian advisories DEBIAN-CVE-2023-3824

  • php7.4 Ubuntu 20.04 LTS 7.4.3-4ubuntu2.20
  • php8.1 Ubuntu 22.04 LTS 8.1.2-1ubuntu2.14
  • php7.0 Ubuntu Pro 16.04 LTS 7.0.33-0ubuntu0.16.04.16+esm8
  • php7.2 Ubuntu Pro 18.04 LTS 7.2.24-0ubuntu0.18.04.17+esm2

ubuntu advisories UBUNTU-CVE-2023-3824

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 7.4.33-2.module+el8.10.0+22485+a3539972
  • libzip RHEL 8 1.6.1-1.module+el8.10.0+22485+a3539972
  • php-gd RHEL 8 7.4.33-2.module+el8.10.0+22485+a3539972
  • php-cli RHEL 8 7.4.33-2.module+el8.10.0+22485+a3539972
  • php-dba RHEL 8 7.4.33-2.module+el8.10.0+22485+a3539972
  • php-dbg RHEL 8 7.4.33-2.module+el8.10.0+22485+a3539972
  • php-ffi RHEL 8 7.4.33-2.module+el8.10.0+22485+a3539972
  • php-fpm RHEL 8 7.4.33-2.module+el8.10.0+22485+a3539972

red hat advisories RHSA-2024:10952RHSA-2024:0387RHSA-2023:5927RHSA-2023:5926

  • php7 SLE Module for Legacy 15 SP5, SLE Module for Legacy 15 SP4, openSUSE Leap 15.5 +1 more 7.4.33-150400.4.28.1
  • php7-fpm SLE Module for Legacy 15 SP5, SLE Module for Legacy 15 SP4, openSUSE Leap 15.5 +1 more 7.4.33-150400.4.28.1
  • php7-test openSUSE Leap 15.5, openSUSE Leap 15.4 7.4.33-150400.4.28.1
  • php7-embed SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4, openSUSE Leap 15.5 +1 more 7.4.33-150400.4.28.1
  • php7-fastcgi SLE Module for Legacy 15 SP5, SLE Module for Legacy 15 SP4, openSUSE Leap 15.5 +1 more 7.4.33-150400.4.28.1
  • apache2-mod_php7 SLE Module for Legacy 15 SP5, SLE Module for Legacy 15 SP4, openSUSE Leap 15.5 +1 more 7.4.33-150400.4.28.1
  • php8 SLE Module for Web and Scripting 15 SP5, SLE Module for Web and Scripting 15 SP4, openSUSE Leap 15.5 +1 more 8.0.30-150400.4.37.1
  • php8-fpm SLE Module for Web and Scripting 15 SP5, SLE Module for Web and Scripting 15 SP4, openSUSE Leap 15.5 +1 more 8.0.30-150400.4.37.1

suse advisories SUSE-SU-2023:3541-1SUSE-SU-2023:3528-1SUSE-SU-2023:3498-1SUSE-SU-2023:3445-1

  • php8 openSUSE Tumbleweed 8.2.9-1.1

opensuse advisories openSUSE-SU-2024:13153-1

  • php AlmaLinux 8 7.4.33-2.module_el8.10.0+3935+28808425
  • libzip AlmaLinux 8 1.6.1-1.module_el8.6.0+3239+bedf0508
  • libzip AlmaLinux 8 1.6.1-1.module_el8.6.0+2750+78feabcb
  • libzip AlmaLinux 8 1.6.1-1.module_el8.10.0+3935+28808425
  • php-gd AlmaLinux 8 7.4.33-2.module_el8.10.0+3935+28808425
  • php-cli AlmaLinux 8 7.4.33-2.module_el8.10.0+3935+28808425
  • php-dba AlmaLinux 8 7.4.33-2.module_el8.10.0+3935+28808425
  • php-dbg AlmaLinux 8 7.4.33-2.module_el8.10.0+3935+28808425

almalinux advisories ALSA-2024:10952ALSA-2024:0387ALSA-2023:5926ALSA-2023:5927

  • php Rocky Linux 8 7.4.33-2.module+el8.10.0+1912+72767185
  • libzip Rocky Linux 8 1.6.1-1.module+el8.10.0+1604+6558efc7
  • php-pear Rocky Linux 8 1:1.10.13-1.module+el8.10.0+1604+6558efc7
  • php-pecl-rrd Rocky Linux 8 2.0.1-1.module+el8.10.0+1604+6558efc7
  • php-pecl-zip Rocky Linux 8 1.18.2-1.module+el8.10.0+1604+6558efc7
  • php-pecl-apcu Rocky Linux 8 5.1.18-1.module+el8.10.0+1604+6558efc7
  • php-pecl-xdebug Rocky Linux 8 2.9.5-1.module+el8.10.0+1604+6558efc7
  • php-pecl-rrd Rocky Linux 9 2.0.3-4.module+el9.6.0+32040+1f1dedb8

rocky linux advisories RLSA-2024:10952RLSA-2024:0387RLSA-2023:5926RLSA-2023:5927

  • php8 Alpine 3.16 8.0.30-r0
  • php81 Alpine 3.17, Alpine 3.16 8.1.22-r0

alpine advisories ALPINE-CVE-2023-3824

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 8.1.22-1
  • php Azure Linux 3.0 8.2.8-1

azure linux advisories AZL-27943AZL-63070

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-2023-3824 updated cvss 7.0

php: phar Buffer mismanagement

  • Red Hat Software Collections rh-php73-php, rh-php73-php-gd, rh-php73-php-cli, rh-php73-php-dba, rh-php73-php-dbg, rh-php73-php-fpm, +22 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) php 8.0.30-1.module+el8.8.0+20302+42d2b711, php 7.4.33-2.module+el8.10.0+22485+a3539972, libzip 1.7.3-1.module+el8.6.0+13671+84712317, libzip 1.6.1-1.module+el8.10.0+22485+a3539972, php-gd 8.0.30-1.module+el8.8.0+20302+42d2b711, php-cli 8.0.30-1.module+el8.8.0+20302+42d2b711, +60 more
    fixed: vendor fix RHSA-2024:10952
  • Red Hat Enterprise Linux AppStream (v. 9) php 8.0.30-1.el9_2, php-gd 8.0.30-1.el9_2, php-cli 8.0.30-1.el9_2, php-dba 8.0.30-1.el9_2, php-dbg 8.0.30-1.el9_2, php-ffi 8.0.30-1.el9_2, +47 more
    fixed: vendor fix RHSA-2023:5926
  • Red Hat Enterprise Linux 6 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +20 more Red Hat Enterprise Linux 7 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +18 more Red Hat OpenShift Dev Spaces 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

21.79% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/php/php-src/security/advisories/GHSA-jqcx-ccgc-xwhv referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami libphp
>=8.0.0, <8.0.30
>=8.1.0, <8.1.22
>=8.2.0, <8.2.9
8.0.30
8.1.22
8.2.9
bitnami php
>=8.0.0, <8.0.30
>=8.1.0, <8.1.22
>=8.2.0, <8.2.9
8.0.30
8.1.22
8.2.9
bitnami php-min
>=8.0.0, <8.0.30
>=8.1.0, <8.1.22
>=8.2.0, <8.2.9
8.0.30
8.1.22
8.2.9

Affected products

  • PHP Group PHP

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
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.