CWE-185Incorrect Regular Expression

Description

Common consequences· 2

• Other — Unexpected State, Varies by Context
  When the regular expression is not correctly specified, data might have a different format or type than the rest of the program expects, producing resultant weaknesses or errors.
• Access Control — Bypass Protection Mechanism
  In PHP, regular expression checks can sometimes be bypassed with a null byte, leading to any number of weaknesses.

Potential mitigations· 1

• [Implementation]Regular expressions can become error prone when defining a complex language even for those experienced in writing grammars. Determine if several smaller regular expressions simplify one large regular expression. Also, subject the regular expression to thorough testing techniques such as equivalence partitioning, boundary value analysis, and robustness. After testing and a reasonable confidence level is achieved, a regular expression may not be foolproof. If an exploit is allowed to slip through, then record the exploit and refactor the regular expression.

Related CAPEC attack patterns· 3

Exploits (incoming)3

(incoming)3

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.