CVE-2015-0231

Exp

Use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.37, 5.5.x before 5.5.21, and 5.6.x before 5.6.5 allows remote attackers to execute arbitrary code via a crafted unserialize call that leverages improper handling of duplicate numerical keys within the serialized properties of an object. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-8142.

Published: 2015-01-27 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-0231 is rated High Exploit Risk (74.5/100): CVSS High severity, with high exploitation likelihood (EPSS 42.59%, 99th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2015-0231

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2015-0231

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 87.33% 42.59% -44.74%
2 2026-05-24 87.21% 87.33% +0.12%
3 2026-05-09 — 87.21% —

Full EPSS history (46 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-0231

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2015-0231

OS Trackers for CVE-2015-0231

vendor priority summary link
gentoo normal CVE-2015-0231: 2 GLSA(s) (201503-03, 201606-10), 1 atom(s) (dev-lang/php); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-0231
redhat medium — https://access.redhat.com/security/cve/CVE-2015-0231
suse low CVE-2015-0231 severity low: SUSE including 896 source package names (apache2-mod_php5-5.2.14-0.7.30.64.1, apache2-mod_php5-5.5.14-11.3, …), 1001 product×package rows across 27 product lines (SUSE Liberty Linux 7, SUSE Linux Enterprise Module for Legacy 15 SP4, … (27 product lines)): Fixed 796, Known Not Affected 205. https://www.suse.com/security/cve/CVE-2015-0231/
ubuntu low CVE-2015-0231 low priority: Ubuntu including 1 source packages (php5), 5 status rows across 5 suites (lucid, precise, trusty, upstream, utopic): released 3, needs-triage 1, not-affected 1. https://ubuntu.com/security/CVE-2015-0231

NVD evaluator notes for CVE-2015-0231

Comment: <a href="http://cwe.mitre.org/data/definitions/416.html">CWE-416: Use After Free</a>

Affected software / configurations for CVE-2015-0231

Vendor Product Version Raw CPE
php php <= 5.4.36 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php 5.4.0 cpe:2.3:a:php:php:5.4.0:*:*:*:*:*:*:*
php php 5.4.1 cpe:2.3:a:php:php:5.4.1:*:*:*:*:*:*:*
php php 5.4.2 cpe:2.3:a:php:php:5.4.2:*:*:*:*:*:*:*
php php 5.4.3 cpe:2.3:a:php:php:5.4.3:*:*:*:*:*:*:*
php php 5.4.4 cpe:2.3:a:php:php:5.4.4:*:*:*:*:*:*:*
php php 5.4.5 cpe:2.3:a:php:php:5.4.5:*:*:*:*:*:*:*
php php 5.4.6 cpe:2.3:a:php:php:5.4.6:*:*:*:*:*:*:*
php php 5.4.7 cpe:2.3:a:php:php:5.4.7:*:*:*:*:*:*:*
php php 5.4.8 cpe:2.3:a:php:php:5.4.8:*:*:*:*:*:*:*
php php 5.4.9 cpe:2.3:a:php:php:5.4.9:*:*:*:*:*:*:*
php php 5.4.10 cpe:2.3:a:php:php:5.4.10:*:*:*:*:*:*:*
php php 5.4.11 cpe:2.3:a:php:php:5.4.11:*:*:*:*:*:*:*
php php 5.4.12 cpe:2.3:a:php:php:5.4.12:*:*:*:*:*:*:*
php php 5.4.12 cpe:2.3:a:php:php:5.4.12:rc1:*:*:*:*:*:*
php php 5.4.12 cpe:2.3:a:php:php:5.4.12:rc2:*:*:*:*:*:*
php php 5.4.13 cpe:2.3:a:php:php:5.4.13:*:*:*:*:*:*:*
php php 5.4.13 cpe:2.3:a:php:php:5.4.13:rc1:*:*:*:*:*:*
php php 5.4.14 cpe:2.3:a:php:php:5.4.14:*:*:*:*:*:*:*
php php 5.4.14 cpe:2.3:a:php:php:5.4.14:rc1:*:*:*:*:*:*
php php 5.4.15 cpe:2.3:a:php:php:5.4.15:rc1:*:*:*:*:*:*
php php 5.4.16 cpe:2.3:a:php:php:5.4.16:rc1:*:*:*:*:*:*
php php 5.4.17 cpe:2.3:a:php:php:5.4.17:*:*:*:*:*:*:*
php php 5.4.18 cpe:2.3:a:php:php:5.4.18:*:*:*:*:*:*:*
php php 5.4.19 cpe:2.3:a:php:php:5.4.19:*:*:*:*:*:*:*
php php 5.4.20 cpe:2.3:a:php:php:5.4.20:*:*:*:*:*:*:*
php php 5.4.21 cpe:2.3:a:php:php:5.4.21:*:*:*:*:*:*:*
php php 5.4.22 cpe:2.3:a:php:php:5.4.22:*:*:*:*:*:*:*
php php 5.4.23 cpe:2.3:a:php:php:5.4.23:*:*:*:*:*:*:*
php php 5.4.24 cpe:2.3:a:php:php:5.4.24:*:*:*:*:*:*:*
php php 5.4.25 cpe:2.3:a:php:php:5.4.25:*:*:*:*:*:*:*
php php 5.4.26 cpe:2.3:a:php:php:5.4.26:*:*:*:*:*:*:*
php php 5.4.27 cpe:2.3:a:php:php:5.4.27:*:*:*:*:*:*:*
php php 5.4.28 cpe:2.3:a:php:php:5.4.28:*:*:*:*:*:*:*
php php 5.4.29 cpe:2.3:a:php:php:5.4.29:*:*:*:*:*:*:*
php php 5.4.30 cpe:2.3:a:php:php:5.4.30:*:*:*:*:*:*:*
php php 5.4.34 cpe:2.3:a:php:php:5.4.34:*:*:*:*:*:*:*
php php 5.4.35 cpe:2.3:a:php:php:5.4.35:*:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:*:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:alpha1:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:alpha2:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:alpha3:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:alpha4:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:alpha5:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:alpha6:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:beta1:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:beta2:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:beta3:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:beta4:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:rc1:*:*:*:*:*:*
php php 5.5.0 cpe:2.3:a:php:php:5.5.0:rc2:*:*:*:*:*:*
php php 5.5.1 cpe:2.3:a:php:php:5.5.1:*:*:*:*:*:*:*
php php 5.5.2 cpe:2.3:a:php:php:5.5.2:*:*:*:*:*:*:*
php php 5.5.3 cpe:2.3:a:php:php:5.5.3:*:*:*:*:*:*:*
php php 5.5.4 cpe:2.3:a:php:php:5.5.4:*:*:*:*:*:*:*
php php 5.5.5 cpe:2.3:a:php:php:5.5.5:*:*:*:*:*:*:*
php php 5.5.6 cpe:2.3:a:php:php:5.5.6:*:*:*:*:*:*:*
php php 5.5.7 cpe:2.3:a:php:php:5.5.7:*:*:*:*:*:*:*
php php 5.5.8 cpe:2.3:a:php:php:5.5.8:*:*:*:*:*:*:*
php php 5.5.9 cpe:2.3:a:php:php:5.5.9:*:*:*:*:*:*:*
php php 5.5.10 cpe:2.3:a:php:php:5.5.10:*:*:*:*:*:*:*
php php 5.5.11 cpe:2.3:a:php:php:5.5.11:*:*:*:*:*:*:*
php php 5.5.12 cpe:2.3:a:php:php:5.5.12:*:*:*:*:*:*:*
php php 5.5.13 cpe:2.3:a:php:php:5.5.13:*:*:*:*:*:*:*
php php 5.5.14 cpe:2.3:a:php:php:5.5.14:*:*:*:*:*:*:*
php php 5.5.15 cpe:2.3:a:php:php:5.5.15:*:*:*:*:*:*:*
php php 5.5.16 cpe:2.3:a:php:php:5.5.16:*:*:*:*:*:*:*
php php 5.5.17 cpe:2.3:a:php:php:5.5.17:*:*:*:*:*:*:*
php php 5.5.18 cpe:2.3:a:php:php:5.5.18:*:*:*:*:*:*:*
php php 5.5.19 cpe:2.3:a:php:php:5.5.19:*:*:*:*:*:*:*
php php 5.5.20 cpe:2.3:a:php:php:5.5.20:*:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:alpha1:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:beta1:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:beta2:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:beta3:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:beta4:*:*:*:*:*:*

References for CVE-2015-0231

URL Tags
http://advisories.mageia.org/MGASA-2015-0040.html
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00029.html
http://lists.opensuse.org/opensuse-updates/2015-02/msg00079.html
http://marc.info/?l=bugtraq&m=143403519711434&w=2
http://marc.info/?l=bugtraq&m=143748090628601&w=2
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://rhn.redhat.com/errata/RHSA-2015-1053.html
http://rhn.redhat.com/errata/RHSA-2015-1066.html
http://rhn.redhat.com/errata/RHSA-2015-1135.html
http://www.debian.org/security/2015/dsa-3195
http://www.mandriva.com/security/advisories?name=MDVSA-2015:032
http://www.mandriva.com/security/advisories?name=MDVSA-2015:079
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.php.net/ChangeLog-5.php
http://www.securityfocus.com/bid/72539
https://bugs.php.net/bug.php?id=68710 Exploit Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1185397
https://github.com/php/php-src/commit/b585a3aed7880a5fa5c18e2b838fc96f40e075bd Patch Vendor Advisory
https://security.gentoo.org/glsa/201503-03
https://security.gentoo.org/glsa/201606-10
https://support.apple.com/HT205267
cvelogic Threat Intelligence