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

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
Vendor Advisory2
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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.