Common Weakness Enumeration

CWE-303

Allowed

Incorrect Implementation of Authentication Algorithm

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.

106 vulnerabilities reference this CWE, most recent first.

CVE-2020-8863 (GCVE-0-2020-8863)

Vulnerability from cvelistv5 – Published: 2020-03-23 20:25 – Updated: 2024-08-04 10:12
VLAI
Summary
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-867, DIR-878, and DIR-882 routers with firmware 1.10B04. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP login requests. The issue results from the lack of proper implementation of the authentication algorithm. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the router. Was ZDI-CAN-9470.
Severity
8.8 (High)
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
zdi CNA
References
Impacted products
Vendor Product Version
D-Link Multiple Routers Affected: 1.10B04
Create a notification for this product.
Credits
chung96vn - Security Researcher of VinCSS (Member of Vingroup)
Show details on NVD website
To clipboard 

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CVE-2020-8861 (GCVE-0-2020-8861)

Vulnerability from cvelistv5 – Published: 2020-02-22 00:00 – Updated: 2024-08-04 10:12
VLAI
Summary
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DAP-1330 1.10B01 BETA Wi-Fi range extenders. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP login requests. The issue results from the lack of proper handling of cookies. An attacker can leverage this vulnerability to execute arbitrary code on the router. Was ZDI-CAN-9554.
Severity
8.8 (High)
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
zdi CNA
References
Impacted products
Vendor Product Version
D-Link DAP-1330 Affected: 1.10B01 BETA
Create a notification for this product.
Credits
chung96vn - Security Researcher of VinCSS (Member of Vingroup)
Show details on NVD website
To clipboard 

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CVE-2020-5268 (GCVE-0-2020-5268)

Vulnerability from cvelistv5 – Published: 2020-04-21 15:30 – Updated: 2024-08-04 08:22
VLAI
Title
Subject Confirmation Method not validated in Saml2 Authentication Services for ASP.NET
Summary
In Saml2 Authentication Services for ASP.NET versions before 1.0.2, and between 2.0.0 and 2.6.0, there is a vulnerability in how tokens are validated in some cases. Saml2 tokens are usually used as bearer tokens - a caller that presents a token is assumed to be the subject of the token. There is also support in the Saml2 protocol for issuing tokens that is tied to a subject through other means, e.g. holder-of-key where possession of a private key must be proved. The Sustainsys.Saml2 library incorrectly treats all incoming tokens as bearer tokens, even though they have another subject confirmation method specified. This could be used by an attacker that could get access to Saml2 tokens with another subject confirmation method than bearer. The attacker could then use such a token to create a log in session. This vulnerability is patched in versions 1.0.2 and 2.7.0.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
Sustainsys Saml2 Affected: < 1.0.2
Affected: >= 2.0.0, <= 2.6.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2019-25436 (GCVE-0-2019-25436)

Vulnerability from cvelistv5 – Published: 2026-02-20 22:54 – Updated: 2026-04-07 14:04
VLAI
Title
Sricam DeviceViewer 3.12.0.1 Password Change Security Bypass
Summary
Sricam DeviceViewer 3.12.0.1 contains a password change security bypass vulnerability that allows authenticated users to change passwords without proper validation of the old password field. Attackers can inject a large payload into the old password parameter during the change password process to bypass validation and set an arbitrary new password.
Severity
5.1 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-24 15:28 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
Sricam DeviceViewer Affected: 3.12.0.1
    cpe:2.3:a:sricam:deviceviewer:3.12.0.1:*:*:*:*:-:*:*
Create a notification for this product.
Date Public
2019-10-09 00:00
Credits
Alessandro Magnosi
Show details on NVD website
To clipboard 

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CVE-2018-4841 (GCVE-0-2018-4841)

Vulnerability from cvelistv5 – Published: 2018-03-29 13:00 – Updated: 2024-09-17 03:02
VLAI
Summary
A vulnerability has been identified in TIM 1531 IRC (All versions < V1.1). A remote attacker with network access to port 80/tcp or port 443/tcp could perform administrative operations on the device without prior authentication. Successful exploitation could allow to cause a denial-of-service, or read and manipulate data as well as configuration settings of the affected device. At the stage of publishing this security advisory no public exploitation is known. Siemens provides mitigations to resolve it.
Severity
No CVSS data available.
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
siemens CNA
References
Impacted products
Vendor Product Version
Siemens AG TIM 1531 IRC Affected: All versions < V1.1
Create a notification for this product.
Date Public
2018-03-27 00:00
Show details on NVD website
To clipboard 

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CVE-2016-9463 (GCVE-0-2016-9463)

Vulnerability from cvelistv5 – Published: 2017-03-28 02:46 – Updated: 2024-08-06 02:50
VLAI
Summary
Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability.
Severity
No CVSS data available.
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithms (CWE-303)
Assigner
hackerone CNA
References
Impacted products
Vendor Product Version
n/a Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 Affected: Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9
Date Public
2017-03-27 00:00
Show details on NVD website
To clipboard 

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              "name": "https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791",
              "refsource": "MISC",
              "url": "https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791"
            },
            {
              "name": "https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/",
              "refsource": "MISC",
              "url": "https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/"
            },
            {
              "name": "https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732",
              "refsource": "MISC",
              "url": "https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732"
            },
            {
              "name": "https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3",
              "refsource": "MISC",
              "url": "https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3"
            },
            {
              "name": "https://hackerone.com/reports/148151",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/148151"
            },
            {
              "name": "https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087",
              "refsource": "MISC",
              "url": "https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087"
            },
            {
              "name": "https://owncloud.org/security/advisory/?id=oc-sa-2016-017",
              "refsource": "MISC",
              "url": "https://owncloud.org/security/advisory/?id=oc-sa-2016-017"
            },
            {
              "name": "https://nextcloud.com/security/advisory/?id=nc-sa-2016-006",
              "refsource": "MISC",
              "url": "https://nextcloud.com/security/advisory/?id=nc-sa-2016-006"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2016-9463",
    "datePublished": "2017-03-28T02:46:00.000Z",
    "dateReserved": "2016-11-19T00:00:00.000Z",
    "dateUpdated": "2024-08-06T02:50:38.584Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

No mitigation information available for this CWE.

CAPEC-90: Reflection Attack in Authentication Protocol

An adversary can abuse an authentication protocol susceptible to reflection attack in order to defeat it. Doing so allows the adversary illegitimate access to the target system, without possessing the requisite credentials. Reflection attacks are of great concern to authentication protocols that rely on a challenge-handshake or similar mechanism. An adversary can impersonate a legitimate user and can gain illegitimate access to the system by successfully mounting a reflection attack during authentication.

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