CVE-2015-2787

critical

Description

Use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.39, 5.5.x before 5.5.23, and 5.6.x before 5.6.7 allows remote attackers to execute arbitrary code via a crafted unserialize call that leverages use of the unset function within an __wakeup function, a related issue to CVE-2015-0231.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-027-02

https://support.apple.com/kb/HT205031

https://support.apple.com/HT205267

https://security.gentoo.org/glsa/201606-10

https://gist.github.com/smalyshev/eea9eafc7c88a4a6d10d

https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-2876

https://bugs.php.net/bug.php?id=68976

http://www.ubuntu.com/usn/USN-2572-1

http://www.securitytracker.com/id/1032485

http://www.securityfocus.com/bid/73431

http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html

http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html

http://rhn.redhat.com/errata/RHSA-2015-1218.html

http://rhn.redhat.com/errata/RHSA-2015-1135.html

http://rhn.redhat.com/errata/RHSA-2015-1066.html

http://rhn.redhat.com/errata/RHSA-2015-1053.html

http://php.net/ChangeLog-5.php

http://marc.info/?l=bugtraq&m=144050155601375&w=2

http://marc.info/?l=bugtraq&m=143748090628601&w=2

http://lists.opensuse.org/opensuse-updates/2015-04/msg00015.html

http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00005.html

http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html

http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html

Details

Source: Mitre, NVD

Published: 2015-03-30

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.11981