CVE-2016-4343

Name: CVE-2016-4343
Creator: NVD / NIST
Published: 2016-05-22T01:59:17.477+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 4.21%

Last modified Jun 17, 2026

CVE-2016-4343 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 4.21% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

4.21%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-824

Affected Software

Vendor	Product	Versions
Php	Php	< 5.5.36
Php	Php	>= 5.6.0, < 5.6.18
Php	Php	>= 7.0.0, < 7.0.3
Opensuse	Opensuse	13.2

References

http://lists.opensuse.org/opensuse-updates/2016-05/msg00086.htmlMailing List, Third Party Advisory
http://php.net/ChangeLog-5.phpRelease Notes, Vendor Advisory
http://php.net/ChangeLog-7.phpRelease Notes, Vendor Advisory
http://rhn.redhat.com/errata/RHSA-2016-2750.htmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/04/28/2Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/89179Third Party Advisory, VDB Entry
https://bugs.php.net/bug.php?id=71331Exploit, Issue Tracking, Vendor Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-05/msg00086.htmlMailing List, Third Party Advisory
http://php.net/ChangeLog-5.phpRelease Notes, Vendor Advisory
http://php.net/ChangeLog-7.phpRelease Notes, Vendor Advisory
http://rhn.redhat.com/errata/RHSA-2016-2750.htmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/04/28/2Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/89179Third Party Advisory, VDB Entry
https://bugs.php.net/bug.php?id=71331Exploit, Issue Tracking, Vendor Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722Third Party Advisory

Timeline

Published: May 22, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-4343?

How severe is CVE-2016-4343?

CVE-2016-4343 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.21% probability of exploitation in the next 30 days.

How do I fix CVE-2016-4343?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-4343?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST