CVE-2015-8023
StrongSwan EAP-MSCHAPv2 Authentication Bypass Vulnerability
Description
The server implementation of the EAP-MSCHAPv2 protocol in the eap-mschapv2 plugin in strongSwan 4.2.12 through 5.x before 5.3.4 does not properly validate local state, which allows remote attackers to bypass authentication via an empty Success message in response to an initial Challenge message.
INFO
Published Date :
Nov. 18, 2015, 4:59 p.m.
Last Modified :
April 12, 2025, 10:46 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
                                            The following products are affected by CVE-2015-8023
                                            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.
                                        
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source | 
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | 
Solution
- Update the affected strongSwan packages.
- Upgrade the affected package.
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-2015-8023.
                                        
CWE - Common Weakness Enumeration
            While CVE identifies
            specific instances of vulnerabilities, CWE categorizes the common flaws or
            weaknesses that can lead to vulnerabilities. CVE-2015-8023 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-2015-8023
            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-2015-8023 vulnerability anywhere in the article.
		
                The following table lists the changes that have been made to the
                CVE-2015-8023 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-364da2661108Nov. 21, 2024 Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00025.html Added Reference http://lists.opensuse.org/opensuse-updates/2015-11/msg00139.html Added Reference http://www.debian.org/security/2015/dsa-3398 Added Reference http://www.securityfocus.com/bid/84947 Added Reference http://www.ubuntu.com/usn/USN-2811-1 Added Reference https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-%28cve-2015-8023%29.html 
- 
                            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 Added Reference MITRE https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-%28cve-2015-8023%29.html [No types assigned] Removed Reference MITRE https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-(cve-2015-8023).html 
- 
                            CVE Modified by [email protected]Aug. 13, 2018 Action Type Old Value New Value Removed Reference https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-%28cve-2015-8023%29.html [Vendor Advisory] Added Reference https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-(cve-2015-8023).html [No Types Assigned] 
- 
                            CVE Modified by [email protected]Dec. 07, 2016 Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-updates/2015-11/msg00139.html [No Types Assigned] Added Reference http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00025.html [No Types Assigned] 
- 
                            CVE Modified by [email protected]Nov. 28, 2016 Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/84947 [No Types Assigned] 
- 
                            Modified Analysis by [email protected]Nov. 24, 2015 Action Type Old Value New Value Changed CPE Configuration Configuration 1 OR *cpe:2.3:a:strongswan:strongswan:4.2.12:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.13:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.14:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.15:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.16:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.5:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.6:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.7:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.4.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.4.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.3:*:*:*:*:*:*:* Configuration 1 OR *cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Configuration 2 OR *cpe:2.3:a:strongswan:strongswan:4.2.12:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.13:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.14:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.15:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.16:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.5:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.6:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.7:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.4.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.4.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.3:*:*:*:*:*:*:* Changed Reference Type https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-%28cve-2015-8023%29.html No Types Assigned https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-%28cve-2015-8023%29.html Advisory 
- 
                            CVE Modified by [email protected]Nov. 20, 2015 Action Type Old Value New Value Removed Reference https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-(cve-2015-8023).html Added Reference https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-%28cve-2015-8023%29.html 
- 
                            Modified Analysis by [email protected]Nov. 19, 2015 Action Type Old Value New Value Added CPE Configuration Configuration 1 OR *cpe:2.3:a:strongswan:strongswan:4.2.12:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.13:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.14:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.15:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.2.16:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.5:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.6:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.3.7:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.4.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.4.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.5.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:4.6.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.0.4:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.1.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.2.3:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.0:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.1:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.2:*:*:*:*:*:*:* *cpe:2.3:a:strongswan:strongswan:5.3.3:*:*:*:*:*:*:* Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CWE CWE-20 Added CWE CWE-264 
- 
                            Initial Analysis by [email protected]Nov. 19, 2015 Action Type Old Value New Value 
Vulnerability Scoring Details
Base CVSS Score: 5
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.80 }} 0.28%
score
0.73018
percentile
 
                         
                         
                         
                                             
                                            