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9.1
CRITICAL CVSS 3.0
CVE-2016-8638
Ipsilon SAML2 Multi-Session Session Logout
Description

A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. It is also called a "SAML2 multi-session vulnerability."

INFO

Published Date :

July 12, 2017, 1:29 p.m.

Last Modified :

April 20, 2025, 1:37 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2016-8638 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 Ipsilon_project ipsilon
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.0 CRITICAL [email protected]
Solution
The ipsilon package is vulnerable to a SAML2 multi-session session logout vulnerability.
  • Update the affected ipsilon package.
  • Update the affected packages.
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-2016-8638.

URL Resource
http://rhn.redhat.com/errata/RHSA-2016-2809.html
http://www.securityfocus.com/bid/94439 Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8638 Issue Tracking Third Party Advisory
https://ipsilon-project.org/advisory/CVE-2016-8638.txt Vendor Advisory
https://ipsilon-project.org/release/2.1.0.html
https://pagure.io/ipsilon/c/511fa8b7001c2f9a42301aa1d4b85aaf170a461c Patch Vendor Advisory
http://rhn.redhat.com/errata/RHSA-2016-2809.html
http://www.securityfocus.com/bid/94439 Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8638 Issue Tracking Third Party Advisory
https://ipsilon-project.org/advisory/CVE-2016-8638.txt Vendor Advisory
https://ipsilon-project.org/release/2.1.0.html
https://pagure.io/ipsilon/c/511fa8b7001c2f9a42301aa1d4b85aaf170a461c Patch Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-8638 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-2016-8638 weaknesses.

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).

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

The following list is the news that have been mention CVE-2016-8638 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2016-8638 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://rhn.redhat.com/errata/RHSA-2016-2809.html
    Added Reference http://www.securityfocus.com/bid/94439
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8638
    Added Reference https://ipsilon-project.org/advisory/CVE-2016-8638.txt
    Added Reference https://ipsilon-project.org/release/2.1.0.html
    Added Reference https://pagure.io/ipsilon/c/511fa8b7001c2f9a42301aa1d4b85aaf170a461c
  • CVE Modified by [email protected]

    May. 14, 2024

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

    Nov. 07, 2023

    Action Type Old Value New Value
    Changed Description A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. It is also called a "SAML2 multi-session vulnerability." A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. It is also called a "SAML2 multi-session vulnerability."
  • CVE Modified by [email protected]

    Feb. 12, 2023

    Action Type Old Value New Value
    Changed Description A vulnerability was found in ipsilon in the SAML2 provider's handling of sessions. An attacker able to hit the logout URL could determine what service providers other users are logged in to and terminate their sessions. A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. It is also called a "SAML2 multi-session vulnerability."
    Removed CVSS V2 Red Hat, Inc. (AV:N/AC:L/Au:N/C:P/I:N/A:P)
    Removed CVSS V3 Red Hat, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
    Removed Reference https://access.redhat.com/errata/RHSA-2016:2809 [No Types Assigned]
    Removed Reference https://access.redhat.com/security/cve/CVE-2016-8638 [No Types Assigned]
    Removed Reference https://bugzilla.redhat.com/show_bug.cgi?id=1392829 [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 02, 2023

    Action Type Old Value New Value
    Changed Description A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. It is also called a "SAML2 multi-session vulnerability." A vulnerability was found in ipsilon in the SAML2 provider's handling of sessions. An attacker able to hit the logout URL could determine what service providers other users are logged in to and terminate their sessions.
    Added CVSS V2 Red Hat, Inc. (AV:N/AC:L/Au:N/C:P/I:N/A:P)
    Added CVSS V3 Red Hat, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1392829 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2016:2809 [No Types Assigned]
    Added Reference https://access.redhat.com/security/cve/CVE-2016-8638 [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 05, 2018

    Action Type Old Value New Value
    Added Reference http://rhn.redhat.com/errata/RHSA-2016-2809.html [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 22, 2017

    Action Type Old Value New Value
    Changed Description A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. It is also called a "SAML2 multi-session vulnerability."
    Added Reference https://ipsilon-project.org/release/2.1.0.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Jul. 17, 2017

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:N/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8638 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8638 Issue Tracking, Third Party Advisory
    Changed Reference Type https://pagure.io/ipsilon/c/511fa8b7001c2f9a42301aa1d4b85aaf170a461c No Types Assigned https://pagure.io/ipsilon/c/511fa8b7001c2f9a42301aa1d4b85aaf170a461c Patch, Vendor Advisory
    Changed Reference Type http://www.securityfocus.com/bid/94439 No Types Assigned http://www.securityfocus.com/bid/94439 Third Party Advisory, VDB Entry
    Changed Reference Type https://ipsilon-project.org/advisory/CVE-2016-8638.txt No Types Assigned https://ipsilon-project.org/advisory/CVE-2016-8638.txt Vendor Advisory
    Added CWE CWE-384
    Added CPE Configuration OR *cpe:2.3:a:ipsilon_project:ipsilon:1.0.0:*:*:*:*:*:*:* *cpe:2.3:a:ipsilon_project:ipsilon:1.0.1:*:*:*:*:*:*:* *cpe:2.3:a:ipsilon_project:ipsilon:1.0.2:*:*:*:*:*:*:* *cpe:2.3:a:ipsilon_project:ipsilon:1.1.0:*:*:*:*:*:*:* *cpe:2.3:a:ipsilon_project:ipsilon:1.1.1:*:*:*:*:*:*:* *cpe:2.3:a:ipsilon_project:ipsilon:1.2.0:*:*:*:*:*:*:* *cpe:2.3:a:ipsilon_project:ipsilon:2.0.0:*:*:*:*:*:*:* *cpe:2.3:a:ipsilon_project:ipsilon:2.0.1:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 17, 2017

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/94439 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 13, 2017

    Action Type Old Value New Value
    Changed Description A vulnerability in ipsilon was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users. A vulnerability in ipsilon 2.0 before 2.0.2, 1.2 before 1.2.1, 1.1 before 1.1.2, and 1.0 before 1.0.3 was found that allows attacker to log out active sessions of other users. This issue is related to how it tracks sessions, and allows an unauthenticated attacker to view and terminate active sessions from other users.
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.
Vulnerability Scoring Details
Base CVSS Score: 9.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 6.4
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

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

7.14 }} -5.16%

score

0.90690

percentile