Comments (2)
The link says there is a low-risk denial of service issue with this module related to regular expressions. A more specific link is here:
https://srcclr.com/security/regular-expression-denial-service-redos-/javascript/sid-1862/technical
Version 0.3.0, the current version, is listed as being vulnerable.
The problematic line pointed to is this one:
https://github.com/ecto/bleach/blob/master/lib/bleach.js#L73
A related reference is here:
https://nodesecurity.io/advisories/47
More about RegEx-based DOS: https://www.owasp.org/index.php/Regular_expression_Denial_of_Service_-_ReDoS
from bleach.
A potential workaround could be this, couldn't it?
Iam not very experienced with Regex-based DOS, but might this help?
html = html.replace(/<script(?:.*?)>(?:.|[\r\n])*?<\/script(?:.*)>/gmi, '');
vs.
html = html.replace(/<script(.*?)>(.*?[\r\n])*?(.*?)(.*?[\r\n])*?<\/script>/gim, '');
Quantified group with a quantifier in it thingy is gone.
from bleach.
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from bleach.