TI-2016-03726 Aliases CVE-2016-4343 GHSA-957h-v895-rv7p

The phar_make_dirstream function in ext/phar/dirstream.c in PHP before 5.6.18 and 7.x…

MEDIUM 45CWE-824Published 2016-05-22 · Updated 2024-08-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 7 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-824 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.04191 90th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Partial Red Hat: 1 advisoryRed Hat: 7 fixed, 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:php:php::::::::	before 5.5.36; 5.6.0 to before 5.6.18; 7.0.0 to before 7.0.3	Vulnerable	PHP
cpe:2.3:o:opensuse:opensuse:13.2:::::::*	13.2	Vulnerable	openSUSE

cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions before 5.5.36; 5.6.0 to before 5.6.18; 7.0.0 to before 7.0.3 Vulnerable ·PHP
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* Versions 13.2 Vulnerable ·openSUSE

Remediation

Red Hat 1 advisory

RHSA-2016:2750 Released 2016-11-15 · Red Hat rating Moderate
rh-php56 security, bug fix, and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 5	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 7	Affected	No fix planned: Will not fix
Red Hat Software Collections	Affected	No fix planned: Will not fix
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)	Fixed	RHSA-2016:2750

Not affected: 1 product

Red Hat Enterprise Linux 5

Timeline

2026-10-02 Threatist record created from CVE-2016-4343
2026-10-03 Alias added: GHSA-957h-v895-rv7p

References

Exploit 1

https://bugs.php.net/bug.php?id=71331

Advisory 8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences