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CVE-2015-8023

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Date: November 18, 2015

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.

Language: C

Severity Score

Related Resources (10)

https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-%28cve-2015-8023%29.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00025.html
http://www.debian.org/security/2015/dsa-3398
https://people.canonical.com/~ubuntu-security/cve/CVE-2015-8023
http://www.ubuntu.com/usn/USN-2811-1
http://www.securityfocus.com/bid/84947
http://lists.opensuse.org/opensuse-updates/2015-11/msg00139.html
https://nvd.nist.gov/vuln/detail/CVE-2015-8023
https://security-tracker.debian.org/tracker/CVE-2015-8023
https://www.mend.io/vulnerability-database/CVE-2015-8023

Severity Score

Weakness Type (CWE)

Input Validation

CWE-20

Permissions, Privileges, and Access Control

CWE-264

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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