Weakness (CWE)
CWE-777: Regular Expression without Anchors
The product uses a regular expression to perform neutralization, but the regular expression omits one or more anchors that may allow malicious or malformed data to slip through.
How to prevent it (1 mitigation)
-
Implementation
Be sure to understand both what will be matched and what will not be matched by a regular expression. Anchoring the ends of the expression will allow the programmer to define an allowlist strictly limited to what is matched by the text in the regular expression. If you are using a package that only matches one line by default, ensure that you can match multi-line inputs if necessary.
Source: MITRE CWE-777
2 results · Clear filters · Feed
-
High 8.2
Apache Traffic Server: Regex mappings match with malicious domain names
Regular Expression without Anchors vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 10.0.X through 10.1.3, from 9.0.X through 9.2.14. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fixes the issue.
-
High 7.6
jupyter-server CORS origin validation bypass via unanchored regex in allow_origin_pat
Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the Origin header validation uses Python's re.match() to check incoming origins against the allow_origin_pat configuration value. Because re.match() only anchors at th…