Common Weakness Enumeration

CWE-289

Allowed

Authentication Bypass by Alternate Name

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The product performs authentication based on the name of a resource being accessed, or the name of the actor performing the access, but it does not properly check all possible names for that resource or actor.

41 vulnerabilities reference this CWE, most recent first.

CVE-2017-16590 (GCVE-0-2017-16590)

Vulnerability from cvelistv5 – Published: 2018-01-23 01:00 – Updated: 2024-08-05 20:27
VLAI
Summary
This vulnerability allows remote attackers to bypass authentication on vulnerable installations of NetGain Systems Enterprise Manager 7.2.699 build 1001. User interaction is required to exploit this vulnerability. The specific flaw exists within the MainFilter servlet. The issue results from the lack of proper string matching inside the doFilter method. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of Administrator. Was ZDI-CAN-5099.
Severity
No CVSS data available.
CWE
  • CWE-289 - Authentication Bypass by Alternate Name
Assigner
zdi CNA
References
Impacted products
Date Public
2017-12-13 00:00
Show details on NVD website
To clipboard 

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Mitigation MIT-44
Architecture and Design

Strategy: Input Validation

Avoid making decisions based on names of resources (e.g. files) if those resources can have alternate names.

Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation MIT-20
Implementation

Strategy: Input Validation

Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.

No CAPEC attack patterns related to this CWE.

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