CVE-2016-4343

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2016-05-22 · updated 2026-06-17
Weakness: CWE-824

Description

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.

Affected products

Opensuse: 13.2
PHP: before 5.5.36; from 5.6.0 before 5.6.18; from 7.0.0 before 7.0.3 — fixed in 5.5.36, 5.6.18, 7.0.3

How to fix

Upgrade to a fixed version: PHP 5.5.36, 5.6.18, 7.0.3. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-updates/2016-05/msg00086.html
http://php.net/ChangeLog-5.php
http://php.net/ChangeLog-7.php
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://www.openwall.com/lists/oss-security/2016/04/28/2
http://www.securityfocus.com/bid/89179
https://bugs.php.net/bug.php?id=71331
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
http://lists.opensuse.org/opensuse-updates/2016-05/msg00086.html
http://php.net/ChangeLog-5.php

Get alerted when CVE-2016-4343 or the next vulnerability affects your stack