mirror of
https://github.com/github/codeql.git
synced 2025-12-24 04:36:35 +01:00
36 lines
1.2 KiB
Plaintext
36 lines
1.2 KiB
Plaintext
/**
|
|
* @name Polynomial regular expression used on uncontrolled data
|
|
* @description A regular expression that can require polynomial time
|
|
* to match may be vulnerable to denial-of-service attacks.
|
|
* @kind path-problem
|
|
* @problem.severity warning
|
|
* @security-severity 7.5
|
|
* @precision high
|
|
* @id js/polynomial-redos
|
|
* @tags security
|
|
* external/cwe/cwe-1333
|
|
* external/cwe/cwe-730
|
|
* external/cwe/cwe-400
|
|
*/
|
|
|
|
import javascript
|
|
import semmle.javascript.security.regexp.PolynomialReDoSQuery
|
|
import semmle.javascript.security.regexp.SuperlinearBackTracking
|
|
import DataFlow::PathGraph
|
|
|
|
from
|
|
Configuration cfg, DataFlow::PathNode source, DataFlow::PathNode sink, Sink sinkNode,
|
|
PolynomialBackTrackingTerm regexp
|
|
where
|
|
cfg.hasFlowPath(source, sink) and
|
|
sinkNode = sink.getNode() and
|
|
regexp = sinkNode.getRegExp() and
|
|
not (
|
|
source.getNode().(Source).getKind() = "url" and
|
|
regexp.isAtEndLine()
|
|
)
|
|
select sinkNode.getHighlight(), source, sink,
|
|
"This $@ that depends on $@ may run slow on strings " + regexp.getPrefixMessage() +
|
|
"with many repetitions of '" + regexp.getPumpString() + "'.", regexp, "regular expression",
|
|
source.getNode(), source.getNode().(Source).describe()
|