Perl code injection
Summary: PortSwigger describes server-side code injection as arising when an application incorporates user-controllable data into a string that is dynamically evaluated by a code interpreter, allowing crafted input to modify and inject arbitrary code when that data is not strictly validated. The write-up rates the issue as high severity, noting such vulnerabilities usually lead to complete compromise of the application's data and functionality and often of the hosting server, which may then be used as a platform for further attacks.
What you should know: A single unvalidated input reaching a dynamically evaluated string can hand an attacker the whole server, not just the application, and from there a launch point against other systems. The guidance is to avoid putting user data into evaluated code entirely, and where that is unavoidable, to accept only a whitelist of specific values or short alphanumeric strings.
Read the original at PortSwigger Research ↗
- Topics
- Supply Chain & AppSec
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