Is CVE-2016-4343 in the CISA KEV catalog?

No. CVE-2016-4343 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-4343?

CVE-2016-4343 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2016-4343?

CVE-2016-4343 has an EPSS score of 4.21% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-4343?

Upgrade libapache2-mod-php5 on ubuntu 14.04 to 5.5.9+dfsg-1ubuntu4.17 or later. Fixes are available for 10 affected products.

CVE & CISA-KEV Catalog

CVE-2016-4343

HIGHEPSS 90th pctl

8.8

CVSS v3

NVD

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.

CWE-824

How to fix

Remediation Available

libapache2-mod-php5Ubuntu

Fixed in:5.5.9+dfsg-1ubuntu4.17USN-2984-1

libapache2-mod-php7.0Ubuntu

Fixed in:7.0.4-7ubuntu2.1USN-2984-1

php5Ubuntu

Fixed in:5.5.9+dfsg-1ubuntu4.17USN-2984-1

php5-cgiUbuntu

Fixed in:5.5.9+dfsg-1ubuntu4.17USN-2984-1

php5-cliUbuntu

Fixed in:5.5.9+dfsg-1ubuntu4.17USN-2984-1

php5-fpmUbuntu

Fixed in:5.5.9+dfsg-1ubuntu4.17USN-2984-1

php7.0Ubuntu

Fixed in:7.0.4-7ubuntu2.1USN-2984-1

php7.0-cgiUbuntu

Fixed in:7.0.4-7ubuntu2.1USN-2984-1

php7.0-cliUbuntu

Fixed in:7.0.4-7ubuntu2.1USN-2984-1

php7.0-fpmUbuntu

Fixed in:7.0.4-7ubuntu2.1USN-2984-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.21%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Exploit1

bugs.php.net

Vendor Advisory2

Third-Party Advisory7

Related Vulnerabilities

Other CWE-824 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-9948	Medium	6.5	64%	-	-
CVE-2018-11803	High	7.5	58%	-	Fix
CVE-2022-21971	High	7.8	54%	KEV	Fix
CVE-2010-1818	High	9.3	43%	-	-
CVE-2015-1770	High	8.8	35%	KEV	-
CVE-2017-12561	Critical	9.8	31%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.