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CVE-2016-4343

Published: 29 April 2016

The phar_make_dirstream function in ext/phar/dirstream.c in PHP before 5.6.18 and 7.x before 7.0.3 mishandles zero-size ././@LongLink files, which allows remote attackers to cause a denial of service (uninitialized pointer dereference) or possibly have unspecified other impact via a crafted TAR archive.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
php5
Launchpad, Ubuntu, Debian
precise
Released (5.3.10-1ubuntu3.23)
trusty
Released (5.5.9+dfsg-1ubuntu4.17)
upstream
Released (5.6.18)
wily
Released (5.6.11+dfsg-1ubuntu3.4)
xenial Does not exist

Patches:
upstream: https://git.php.net/?p=php-src.git;a=commit;h=4c2424eb24b0178456acc404dbfff528cdc44197
upstream: https://git.php.net/?p=php-src.git;a=commit;h=9649ca1630433473a307d015ba1a79a4a7a779f5

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

trusty Does not exist

upstream
Released (7.0.3)
wily Does not exist

xenial Not vulnerable
(7.0.4-7ubuntu2)
Patches:


upstream: https://git.php.net/?p=php-src.git;a=commit;h=4c2424eb24b0178456acc404dbfff528cdc44197

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H