9.8
CRITICAL
CVE-2015-6835
Apache PHP: Deserialization Vulnerability
Description

The session deserializer in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 mishandles multiple php_var_unserialize calls, which allow remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted session content.

INFO

Published Date :

May 16, 2016, 10:59 a.m.

Last Modified :

Nov. 7, 2023, 2:27 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2015-6835 has a 3 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2015-6835 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Php php
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2015-6835.

URL Resource
http://php.net/ChangeLog-5.php
http://www.debian.org/security/2015/dsa-3358
http://www.securityfocus.com/bid/76734
http://www.securitytracker.com/id/1033548
https://bugs.php.net/bug.php?id=70219
https://security.gentoo.org/glsa/201606-10

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
VoidSec/Joomla_CVE-2015-8562

A proof of concept for Joomla's CVE-2015-8562 vulnerability (Object Injection RCE)

joomla vulnerability cve-2015-8562 php rce exploit

Python

Updated: 8 months, 1 week ago
7 stars 8 fork 8 watcher
Born at : Sept. 17, 2017, 3:03 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
RobinHoutevelts/Joomla-CVE-2015-8562-PHP-POC

A proof of concept for Joomla's CVE-2015-8562 vulnerability

PHP

Updated: 5 years, 3 months ago
1 stars 0 fork 0 watcher
Born at : Jan. 4, 2016, 10:27 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
ockeghem/CVE-2015-6835-checker

None

PHP

Updated: 1 year, 3 months ago
3 stars 0 fork 0 watcher
Born at : Dec. 19, 2015, 7:55 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2015-6835 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2015-6835 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Source Update by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Changed Source SUSE OpenText
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference OpenText http://www.securityfocus.com/bid/76734 [No types assigned]
    Added Reference OpenText https://bugs.php.net/bug.php?id=70219 [No types assigned]
    Added Reference OpenText http://www.securitytracker.com/id/1033548 [No types assigned]
    Added Reference OpenText http://php.net/ChangeLog-5.php [No types assigned]
    Added Reference OpenText http://www.debian.org/security/2015/dsa-3358 [No types assigned]
    Added Reference OpenText https://security.gentoo.org/glsa/201606-10 [No types assigned]
    Removed Reference SUSE http://php.net/ChangeLog-5.php
    Removed Reference SUSE https://bugs.php.net/bug.php?id=70219
    Removed Reference SUSE http://www.securityfocus.com/bid/76734
    Removed Reference SUSE https://security.gentoo.org/glsa/201606-10
    Removed Reference SUSE http://www.securitytracker.com/id/1033548
    Removed Reference SUSE http://www.debian.org/security/2015/dsa-3358
  • CVE Modified by [email protected]

    Nov. 04, 2017

    Action Type Old Value New Value
    Added Reference http://www.debian.org/security/2015/dsa-3358 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 17, 2017

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1033548 [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 30, 2016

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/201606-10 [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 28, 2016

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/76734 [No Types Assigned]
  • Modified Analysis by [email protected]

    May. 18, 2016

    Action Type Old Value New Value
    Added Evaluator Description <a href="http://cwe.mitre.org/data/definitions/416.html">CWE-416: Use After Free</a>
    Added CPE Configuration Configuration 1 OR *cpe:2.3:a:php:php:5.6.9:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.8:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.7:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.6:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.5:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.4:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.12:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.11:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.10:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:beta4:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:beta3:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:beta2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:beta1:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha1:*:*:*:*:*:* Configuration 2 OR *cpe:2.3:a:php:php:5.4.44:*:*:*:*:*:*:* (and previous) Configuration 3 OR *cpe:2.3:a:php:php:5.5.28:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.17:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.16:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.15:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.9:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.8:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.7:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.6:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.5:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.4:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.3:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.27:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.26:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.25:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.24:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.23:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.22:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.21:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.20:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.2:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.19:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.18:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.14:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.13:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.12:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.11:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.10:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.1:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:rc2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:rc1:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:beta4:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:beta3:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:beta2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:beta1:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha6:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha5:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha4:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha3:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha1:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:*:*:*:*:*:*:*
    Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://bugs.php.net/bug.php?id=70219 No Types Assigned https://bugs.php.net/bug.php?id=70219 Exploit
    Added CWE NVD-CWE-Other
  • CVE Translated by [email protected]

    May. 18, 2016

    Action Type Old Value New Value
    Removed Translation La sesión deserializer en PHP en versiones anteriores a 5.4.45, 5.5.x en versiones anteriores a 5.5.29 y 5.6.x en versiones anteriores a 5.6.13 no es correctamente manejada en llamadas multiples php_var_unserialize, lo que permite a atacantes remotos ejecutar un código arbitrario o causar una denegación del servicio (use-after-free) a través de una sesión de contenido manipulada.
    Added Translation La sesión deserializer en PHP en versiones anteriores a 5.4.45, 5.5.x en versiones anteriores a 5.5.29 y 5.6.x en versiones anteriores a 5.6.13 no es correctamente manejada en llamadas multiples php_var_unserialize, lo que permite a atacantes remotos ejecutar código arbitrario o causar una denegación del servicio (uso después de liberación de memoria) a través de una sesión de contenido manipulada.
  • Initial Analysis by [email protected]

    May. 16, 2016

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2015-6835 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2015-6835 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

9.01 }} 0.18%

score

0.94633

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: