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CVE-2018-20783

Published: 21 February 2019

In PHP before 5.6.39, 7.x before 7.0.33, 7.1.x before 7.1.25, and 7.2.x before 7.2.13, a buffer over-read in PHAR reading functions may allow an attacker to read allocated or unallocated memory past the actual data when trying to parse a .phar file. This is related to phar_parse_pharfile in ext/phar/phar.c.

Notes

AuthorNote
sbeattie
PEAR issues should go against php-pear as of xenial

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

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

cosmic Does not exist

disco Does not exist

trusty
Released (5.5.9+dfsg-1ubuntu4.29+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.6.39)
xenial Does not exist

Patches:
upstream: http://git.php.net/?p=php-src.git;a=commit;h=48f0f73f75c0059ba5d9b73cb4e5faeeaea49c47
php7.0
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (7.0.33)
xenial
Released (7.0.33-0ubuntu0.16.04.1)
php7.2
Launchpad, Ubuntu, Debian
bionic
Released (7.2.15-0ubuntu0.18.04.1)
cosmic
Released (7.2.15-0ubuntu0.18.04.1)
disco
Released (7.2.15-0ubuntu0.18.04.1)
trusty Does not exist

upstream
Released (7.2.13)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (7.3.0-1)
xenial Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N