CVE-2016-4343

Publication date 29 April 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
php5	16.04 LTS xenial	Not in release
	15.10 wily	Fixed 5.6.11+dfsg-1ubuntu3.4
	14.04 LTS trusty	Fixed 5.5.9+dfsg-1ubuntu4.17
	12.04 LTS precise	Fixed 5.3.10-1ubuntu3.23
php7.0	16.04 LTS xenial	Not affected
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
php5	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	Upstream: https://git.php.net/?p=php-src.git;a=commit;h=4c2424eb24b0178456acc404dbfff528cdc44197

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.8 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	8.8 · High
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-2984-1
PHP vulnerabilities
24 May 2016

Other references

https://www.cve.org/CVERecord?id=CVE-2016-4343