Detail CWE-558

The product uses the getlogin() function in a multithreaded context, potentially causing it to return incorrect values.

Mode Pengenalan

Implementation

Platform yang Berlaku

Bahasa

Nama: C (Undetermined)
Nama: C++ (Undetermined)

Konsekuensi Umum

Mitigasi yang Memungkinkan

Phases : Implementation
Use getlogin_r() instead, which is reentrant, meaning that other processes or threads are locked out from changing the username.
Phases : Architecture and Design
Using names for security purposes is not advised. Names are easy to forge and can have overlapping user IDs, potentially causing confusion or impersonation.

Metode Deteksi

Automated Static Analysis

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)

Catatan Pemetaan Kerentanan

Justifikasi : This CWE entry is at the Variant level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Komentar : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Pengajuan

Modifikasi