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Fencer Vulns
medium 5.3

CVE-2020-7066 json

get_headers() silently truncates after a null byte

published 2020-04-01 6 y ago modified 2026-09-08 2 mo ago also BIT-libphp-2020-7066 , BIT-php-2020-7066 , BIT-php-min-2020-7066 , EUVD-2020-28200

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

In PHP versions 7.2.x below 7.2.29, 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using get_headers() with user-supplied URL, if the URL contains zero (\0) character, the URL will be silently truncated at it. This may cause some software to make incorrect assumptions about the target of the get_headers() and possibly send some information to a wrong server.

Patch / fix

  • bitnami libphp 7.2.29, 7.3.16, 7.4.4
  • bitnami php 7.2.29, 7.3.16, 7.4.4
  • bitnami php-min 7.2.29, 7.3.16, 7.4.4
  • php php 7.2.29, 7.3.16, 7.4.4
  • tenable tenable.sc 5.19.0
  • php7.4 Debian 11 7.4.5-1

debian advisories DEBIAN-CVE-2020-7066

  • php7.0 Ubuntu 16.04 LTS 7.0.33-0ubuntu0.16.04.14
  • php7.2 Ubuntu 18.04 LTS 7.2.24-0ubuntu0.18.04.4
  • php7.4 Ubuntu 20.04 LTS 7.4.3-4ubuntu1.1
  • php5 Ubuntu Pro 14.04 LTS 5.5.9+dfsg-1ubuntu4.29+esm11

ubuntu advisories UBUNTU-CVE-2020-7066

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 7.3.20-1.module+el8.2.0+7373+b272fdef
  • libzip RHEL 8 1.5.2-1.module+el8.1.0+3189+a1bff096
  • php-gd RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-cli RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-dba RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-dbg RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-fpm RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef
  • php-gmp RHEL 8 7.3.20-1.module+el8.2.0+7373+b272fdef

red hat advisories RHSA-2020:3662RHSA-2020:5275

  • php7 SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +8 more 7.2.34-150000.4.103.1
  • php5 SLE Software Development Kit 12 SP4, SLE Module for Web and Scripting 12 5.5.14-109.76.1
  • php72 SLE Software Development Kit 12 SP5, SLE Software Development Kit 12 SP4, SLE Module for Web and Scripting 12 7.2.5-1.46.1
  • php7 SLE Module for Web and Scripting 15 SP1 7.2.5-4.55.7
  • tidy SLE Module for Web and Scripting 15 SP1, SLE Module for Development Tools 15 SP1 5.4.0-3.2.1

suse advisories SUSE-SU-2022:4067-1SUSE-SU-2020:1714-1SUSE-SU-2020:1546-1SUSE-SU-2020:1199-1

  • php7 openSUSE Leap 15.1 7.2.5-lp151.6.25.1
  • tidy openSUSE Leap 15.1 5.4.0-lp151.3.3.1
  • php7-test openSUSE Leap 15.1 7.2.5-lp151.6.25.1

opensuse advisories openSUSE-SU-2020:0642-1

  • php AlmaLinux 8 7.3.20-1.module_el8.4.0+2229+b272fdef
  • php AlmaLinux 8 7.3.20-1.module_el8.5.0+152+112d3b8c
  • php AlmaLinux 8 7.3.20-1.module_el8.3.0+2009+b272fdef
  • libzip AlmaLinux 8 1.5.2-1.module_el8.5.0+152+112d3b8c
  • libzip AlmaLinux 8 1.5.2-1.module_el8.3.0+2009+b272fdef
  • libzip AlmaLinux 8 1.5.2-1.module_el8.4.0+2229+b272fdef
  • php-gd AlmaLinux 8 7.3.20-1.module_el8.4.0+2229+b272fdef
  • php-gd AlmaLinux 8 7.3.20-1.module_el8.3.0+2009+b272fdef

almalinux advisories ALSA-2020:3662

  • php Rocky Linux 8 7.3.20-1.module+el8.4.0+414+2e7afcdd
  • libzip Rocky Linux 8 1.5.2-1.module+el8.4.0+414+2e7afcdd
  • php-pear Rocky Linux 8 1:1.10.9-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-rrd Rocky Linux 8 2.0.1-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-zip Rocky Linux 8 1.15.4-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-apcu Rocky Linux 8 5.1.17-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-xdebug Rocky Linux 8 2.8.0-1.module+el8.4.0+414+2e7afcdd

rocky linux advisories RLSA-2020:3662

  • php7 Alpine 3.15, Alpine 3.14, Alpine 3.13 +2 more 7.3.16-r0
  • php7 Alpine 3.9 7.2.31-r0

alpine advisories ALPINE-CVE-2020-7066

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-2020-7066 updated cvss 4.3

php: Information disclosure in function get_headers

  • Red Hat Enterprise Linux 8 php, libzip, php-gd, php-cli, php-dba, php-dbg, +30 more Red Hat Software Collections rh-php72-php, rh-php72-php-gd, rh-php72-php-cli, rh-php72-php-dba, rh-php72-php-dbg, rh-php72-php-fpm, +22 more
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 8) php 7.3.20-1.module+el8.2.0+7373+b272fdef, libzip 1.5.2-1.module+el8.1.0+3189+a1bff096, php-gd 7.3.20-1.module+el8.2.0+7373+b272fdef, php-cli 7.3.20-1.module+el8.2.0+7373+b272fdef, php-dba 7.3.20-1.module+el8.2.0+7373+b272fdef, php-dbg 7.3.20-1.module+el8.2.0+7373+b272fdef, +28 more
    fixed: vendor fix RHSA-2020:3662
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-php73-php 7.3.20-1.el7, rh-php73-php-gd 7.3.20-1.el7, rh-php73-php-cli 7.3.20-1.el7, rh-php73-php-dba 7.3.20-1.el7, rh-php73-php-dbg 7.3.20-1.el7, rh-php73-php-fpm 7.3.20-1.el7, +22 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-php73-php 7.3.20-1.el7, rh-php73-php-gd 7.3.20-1.el7, rh-php73-php-cli 7.3.20-1.el7, rh-php73-php-dba 7.3.20-1.el7, rh-php73-php-dbg 7.3.20-1.el7, rh-php73-php-fpm 7.3.20-1.el7, +22 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-php73-php 7.3.20-1.el7, rh-php73-php-gd 7.3.20-1.el7, rh-php73-php-cli 7.3.20-1.el7, rh-php73-php-dba 7.3.20-1.el7, rh-php73-php-dbg 7.3.20-1.el7, rh-php73-php-fpm 7.3.20-1.el7, +22 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-php73-php 7.3.20-1.el7, rh-php73-php-gd 7.3.20-1.el7, rh-php73-php-cli 7.3.20-1.el7, rh-php73-php-dba 7.3.20-1.el7, rh-php73-php-dbg 7.3.20-1.el7, rh-php73-php-fpm 7.3.20-1.el7, +22 more
    fixed: vendor fix RHSA-2020:5275
  • Red Hat Enterprise Linux 5 php, php53 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
    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 ICSA-26-027-02 updated cvss 4.3

Festo Didactic SE MES PC

  • Festo Didactic SE MES PC shipped_with_Windows_10
    affected: vendor fix

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

2.66% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.php.net https://bugs.php.net/bug.php?id=79329 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
bitnami libphp
>=7.2.0, <7.2.29
>=7.3.0, <7.3.16
>=7.4.0, <7.4.4
7.2.29
7.3.16
7.4.4
bitnami php
>=7.2.0, <7.2.29
>=7.3.0, <7.3.16
>=7.4.0, <7.4.4
7.2.29
7.3.16
7.4.4
bitnami php-min
>=7.2.0, <7.2.29
>=7.3.0, <7.3.16
>=7.4.0, <7.4.4
7.2.29
7.3.16
7.4.4

Affected products

  • PHP Group PHP

Classification

Weakness
  • CWE-170 Improper Null Termination
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.