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CVE-2020-7060

Published: 10 February 2020

When using certain mbstring functions to convert multibyte encodings, in PHP versions 7.2.x below 7.2.27, 7.3.x below 7.3.14 and 7.4.x below 7.4.2 it is possible to supply data that will cause function mbfl_filt_conv_big5_wchar to read past the allocated buffer. This may lead to information disclosure or crash.

Priority

Medium

Cvss 3 Severity Score

9.1

Score breakdown

Status

Package Release Status
php5
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

trusty
Released (5.5.9+dfsg-1ubuntu4.29+esm10)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial Does not exist

Patches:
upstream: https://github.com/microsoft/php-src/commit/31b5f3736519f3cb1af875f22f70423934a636d6



php7.0
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (7.0.33-0ubuntu0.16.04.11)
php7.2
Launchpad, Ubuntu, Debian
bionic
Released (7.2.24-0ubuntu0.18.04.3)
eoan Does not exist

trusty Does not exist

upstream
Released (7.2.27)
xenial Does not exist

Patches:

upstream: http://git.php.net/?p=php-src.git;a=commit;h=2bcbc95f033c31b00595ed39f79c3a99b4ed0501


php7.3
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan
Released (7.3.11-0ubuntu0.19.10.3)
trusty Does not exist

upstream
Released (7.3.14)
xenial Does not exist

Patches:


upstream: http://git.php.net/?p=php-src.git;a=commit;h=2bcbc95f033c31b00595ed39f79c3a99b4ed0501
upstream: http://git.php.net/?p=php-src.git;a=commit;h=25ec7eb3463f34a2be666c6785d1c6b3cc89575e

Severity score breakdown

Parameter Value
Base score 9.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H