Is CVE-2015-4643 being actively exploited?

CVE-2015-4643 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2015-4643?

CVE-2015-4643 has a CVSS 3.0 base score of 9.8 (CRITICAL).

CVE-2015-4643

CRITICAL · CVSS 9.8EPSS 16.3%EU EUVD

Integer overflow in the ftp_genlist function in ext/ftp/ftp.c in PHP before 5.4.42, 5.5.x before 5.5.26, and 5.6.x before 5.6.10 allows remote FTP servers to execute arbitrary code via a long reply to a LIST command, leading to a heap-based buffer overflow. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-4022.

Key facts

CVSS score: 9.8 (v3.0)
Severity: CRITICAL
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
EPSS score: 16.3% (97th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2015-4662)
Published: May 16, 2016
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2015-4662 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

debian / debian linux
debian / debian linux
oracle / linux
oracle / linux
php / php
redhat / enterprise linux desktop
redhat / enterprise linux desktop
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server aus
redhat / enterprise linux server aus
redhat / enterprise linux server aus
redhat / enterprise linux server aus
redhat / enterprise linux server eus
redhat / enterprise linux server eus
redhat / enterprise linux server eus
redhat / enterprise linux server eus
redhat / enterprise linux server eus
redhat / enterprise linux server eus
redhat / enterprise linux server eus
redhat / enterprise linux server tus
redhat / enterprise linux server tus
redhat / enterprise linux server tus
redhat / enterprise linux workstation
redhat / enterprise linux workstation

Certified products that may be affected

7 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Oracle Linux 7 Unbreakable Enterprise Kernel (UEK 6) Cryptographic Module - Oracle Corporation - FIPS 140 4169 - historical
Red Hat Enterprise Linux 7.6 - Red Hat, Inc. - Common Criteria CCEVS-VR-VID-11039-2020 - archived
Oracle Linux 6 Kernel Crypto API Cryptographic Module - Oracle Corporation - FIPS 140 3421 - historical
Oracle Linux 6 Libreswan Cryptographic Module - Oracle Corporation - FIPS 140 3170 - historical
Oracle Linux 6 NSS Cryptographic Module - Oracle Corporation - FIPS 140 3111 - historical

See all 7 in the Security Certifications Explorer.

References

http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=0765623d6991b62ffcd93ddb6be8a5203a2fa7e2
http://openwall.com/lists/oss-security/2015/06/18/6(Mailing List, Patch, Third Party Advisory)
http://php.net/ChangeLog-5.php(Release Notes, Vendor Advisory)
http://rhn.redhat.com/errata/RHSA-2015-1135.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2015-1186.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2015-1187.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2015-1218.html(Third Party Advisory)
http://www.debian.org/security/2015/dsa-3344(Third Party Advisory)
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html(Third Party Advisory)
http://www.securityfocus.com/bid/75291(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1032709(Third Party Advisory, VDB Entry)
https://bugs.php.net/bug.php?id=69545(Exploit, Issue Tracking, Vendor Advisory)
https://security.gentoo.org/glsa/201606-10(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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