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Fencer Vulns
medium 6.5

CVE-2022-31630 json

OOB read due to insufficient input validation in imageloadfont()

published 2022-11-14 3 y ago modified 2026-09-08 2 mo ago also BIT-libphp-2022-31630 , BIT-php-2022-31630 , BIT-php-min-2022-31630 , EUVD-2022-53082

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

In PHP versions prior to 7.4.33, 8.0.25 and 8.1.12, when using imageloadfont() function in gd extension, it is possible to supply a specially crafted font file, such as if the loaded font is used with imagechar() function, the read outside allocated buffer will be used. This can lead to crashes or disclosure of confidential information.

Patch / fix

  • bitnami libphp 7.4.33, 8.0.25, 8.1.12
  • bitnami php 7.4.33, 8.0.25, 8.1.12
  • bitnami php-min 7.4.33, 8.0.25, 8.1.12
  • PHP Group PHP 7.4.33, 8.0.25, 8.1.12
  • php7.4 Debian 11 7.4.33-1+deb11u1

debian advisories DEBIAN-CVE-2022-31630

  • php7.4 Ubuntu 20.04 LTS 7.4.3-4ubuntu2.15
  • php8.1 Ubuntu 22.04 LTS 8.1.2-1ubuntu2.8

ubuntu advisories UBUNTU-CVE-2022-31630

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 7.4.33-1.module+el8.8.0+17865+ef7eddfa
  • libzip RHEL 8 1.6.1-1.module+el8.3.0+6678+b09f589e
  • php-gd RHEL 8 7.4.33-1.module+el8.8.0+17865+ef7eddfa
  • php-cli RHEL 8 7.4.33-1.module+el8.8.0+17865+ef7eddfa
  • php-dba RHEL 8 7.4.33-1.module+el8.8.0+17865+ef7eddfa
  • php-dbg RHEL 8 7.4.33-1.module+el8.8.0+17865+ef7eddfa
  • php-ffi RHEL 8 7.4.33-1.module+el8.8.0+17865+ef7eddfa
  • php-fpm RHEL 8 7.4.33-1.module+el8.8.0+17865+ef7eddfa

red hat advisories RHSA-2023:2903RHSA-2023:2417RHSA-2023:0965RHSA-2023:0848

  • php7 SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +10 more 7.4.33-150200.3.46.2
  • php7-test openSUSE Leap 15.3 7.4.33-150200.3.46.2
  • php74 SLE Software Development Kit 12 SP5, SLE Module for Web and Scripting 12 7.4.33-1.47.2
  • php8 SLE Module for Web and Scripting 15 SP4, openSUSE Leap 15.4 8.0.25-150400.4.17.1
  • php8-fpm SLE Module for Web and Scripting 15 SP4, openSUSE Leap 15.4 8.0.25-150400.4.17.1
  • php8-test SLE Module for Web and Scripting 15 SP4, openSUSE Leap 15.4 8.0.25-150400.4.17.1
  • php8-embed SLE Module for Web and Scripting 15 SP4, openSUSE Leap 15.4 8.0.25-150400.4.17.1
  • php8-fastcgi SLE Module for Web and Scripting 15 SP4, openSUSE Leap 15.4 8.0.25-150400.4.17.1

suse advisories SUSE-SU-2022:4069-1SUSE-SU-2022:4068-1SUSE-SU-2022:4005-1SUSE-SU-2022:3997-1

  • php8 openSUSE Tumbleweed 8.1.12-1.1

opensuse advisories openSUSE-SU-2024:12467-1

  • php AlmaLinux 8 7.4.33-1.module_el8.8.0+3477+f828cbb0
  • libzip AlmaLinux 8 1.6.1-1.module_el8.6.0+2750+78feabcb
  • libzip AlmaLinux 8 1.6.1-1.module_el8.6.0+3239+bedf0508
  • php-gd AlmaLinux 8 7.4.33-1.module_el8.8.0+3477+f828cbb0
  • php-cli AlmaLinux 8 7.4.33-1.module_el8.8.0+3477+f828cbb0
  • php-dba AlmaLinux 8 7.4.33-1.module_el8.8.0+3477+f828cbb0
  • php-dbg AlmaLinux 8 7.4.33-1.module_el8.8.0+3477+f828cbb0
  • php-ffi AlmaLinux 8 7.4.33-1.module_el8.8.0+3477+f828cbb0

almalinux advisories ALSA-2023:2903ALSA-2023:2417ALSA-2023:0965ALSA-2023:0848

  • php-pecl-rrd Rocky Linux 9 2.0.3-4.module+el9.7.0+40005+715283ec
  • php-pecl-rrd Rocky Linux 9 2.0.3-4.module+el9.7.0+40004+bf50a568
  • php-pecl-rrd Rocky Linux 9 2.0.3-4.module+el9.7.0+40003+454ed3c4
  • php-pecl-zip Rocky Linux 9 1.20.1-1.module+el9.7.0+40003+454ed3c4
  • php-pecl-apcu Rocky Linux 9 5.1.21-1.module+el9.7.0+40003+454ed3c4
  • php-pecl-xdebug3 Rocky Linux 9 3.1.4-1.module+el9.7.0+40003+454ed3c4
  • php Rocky Linux 8 7.4.33-1.module+el8.10.0+1604+6558efc7
  • libzip Rocky Linux 8 1.6.1-1.module+el8.10.0+1912+72767185

rocky linux advisories RLSA-2023:2417RLSA-2023:2903RLSA-2023:0965RLSA-2023:0848

  • php7 Alpine 3.15, Alpine 3.14 7.4.33-r0
  • php8 Alpine 3.16, Alpine 3.15 8.0.25-r0
  • php81 Alpine 3.19, Alpine 3.18, Alpine 3.17 +1 more 8.1.12-r0
  • php82 Alpine 3.22, Alpine 3.21, Alpine 3.20 +2 more 8.2.0_rc5-r0

alpine advisories ALPINE-CVE-2022-31630

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

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-2022-31630 updated cvss 6.5

php: OOB read due to insufficient input validation in imageloadfont()

  • Red Hat Enterprise Linux AppStream (v. 8) php 7.4.33-1.module+el8.8.0+17865+ef7eddfa, php 8.0.27-1.module+el8.7.0+17863+0ad92cd2, libzip 1.6.1-1.module+el8.3.0+6678+b09f589e, libzip 1.7.3-1.module+el8.6.0+13671+84712317, php-gd 7.4.33-1.module+el8.8.0+17865+ef7eddfa, php-gd 8.0.27-1.module+el8.7.0+17863+0ad92cd2, +60 more
    fixed: vendor fix RHSA-2023:0848
  • Red Hat Enterprise Linux AppStream (v. 9) php 8.0.27-1.el9_1, php-gd 8.0.27-1.el9_1, php-cli 8.0.27-1.el9_1, php-dba 8.0.27-1.el9_1, php-dbg 8.0.27-1.el9_1, php-ffi 8.0.27-1.el9_1, +47 more
    fixed: vendor fix RHSA-2023:0965
  • 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 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
    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

1.32% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.php.net https://bugs.php.net/bug.php?id=81739 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
OSV 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami libphp
>=7.4.0, <7.4.33
>=8.0.0, <8.0.25
>=8.1.0, <8.1.12
7.4.33
8.0.25
8.1.12
bitnami php
>=7.4.0, <7.4.33
>=8.0.0, <8.0.25
>=8.1.0, <8.1.12
7.4.33
8.0.25
8.1.12
bitnami php-min
>=7.4.0, <7.4.33
>=8.0.0, <8.0.25
>=8.1.0, <8.1.12
7.4.33
8.0.25
8.1.12

Affected products

  • PHP Group PHP

Classification

Weakness
  • CWE-131 Incorrect Calculation of Buffer Size
  • CWE-190 Integer Overflow or Wraparound
  • CWE-125 Out-of-bounds Read
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.