The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.
N/A
Threat Mapped score: 0.0
Industry: Finiancial
Threat priority: Unclassified
CVE: CVE-2024-4315
Chain: API for text generation using Large Language Models (LLMs) does not include the "\" Windows folder separator in its denylist (CWE-184) when attempting to prevent Local File Inclusion via path traversal (CWE-22), allowing deletion of arbitrary files on Windows systems.
CVE: CVE-2008-2309
product uses a denylist to identify potentially dangerous content, allowing attacker to bypass a warning
CVE: CVE-2005-2782
PHP remote file inclusion in web application that filters "http" and "https" URLs, but not "ftp".
CVE: CVE-2004-0542
Programming language does not filter certain shell metacharacters in Windows environment.
CVE: CVE-2004-0595
XSS filter doesn't filter null characters before looking for dangerous tags, which are ignored by web browsers. MIE and validate-before-cleanse.
CVE: CVE-2005-3287
Web-based mail product doesn't restrict dangerous extensions such as ASPX on a web server, even though others are prohibited.
CVE: CVE-2004-2351
Resultant XSS when only <script> and <style> are checked.
CVE: CVE-2005-2959
Privileged program does not clear sensitive environment variables that are used by bash. Overlaps multiple interpretation error.
CVE: CVE-2005-1824
SQL injection protection scheme does not quote the "\" special character.
CVE: CVE-2005-2184
Detection of risky filename extensions prevents users from automatically executing .EXE files, but .LNK is accepted, allowing resultant Windows symbolic link.
CVE: CVE-2007-1343
Product uses list of protected variables, but accidentally omits one dangerous variable, allowing external modification
CVE: CVE-2007-5727
Chain: product only removes SCRIPT tags (CWE-184), enabling XSS (CWE-79)
CVE: CVE-2006-4308
Chain: product only checks for use of "javascript:" tag (CWE-184), allowing XSS (CWE-79) using other tags
CVE: CVE-2007-3572
Chain: OS command injection (CWE-78) enabled by using an unexpected character that is not explicitly disallowed (CWE-184)
CVE: CVE-2002-0661
"\" not in list of disallowed values for web server, allowing path traversal attacks when the server is run on Windows and other OSes.
N/A
| Phase | Note |
|---|---|
| Implementation | Developers often try to protect their products against malicious input by checking against lists of known bad inputs, such as special characters that can invoke new commands. However, such lists often only address the most well-known bad inputs. As a quick fix, developers might rely on these lists instead of addressing the root cause of the issue. See [REF-141]. |
| Architecture and Design | The design might rely solely on detection of malicious inputs as a protection mechanism. |
Intro: The following code attempts to stop XSS attacks by removing all occurences of "script" in an input string.
Body: Because the code only checks for the lower-case "script" string, it can be easily defeated with upper-case script tags.
public String removeScriptTags(String input, String mask) { return input.replaceAll("script", mask); }