Impact
Luxon's `DateTime.fromRFC2822() has quadratic (N^2) complexity on some specific inputs. This causes a noticeable slowdown for inputs with lengths above 10k characters. Users providing untrusted data to this method are therefore vulnerable to (Re)DoS attacks.
This is the same bug as Moment's GHSA-wc69-rhjr-hc9g
Workarounds
Limit the length of the input.
References
There is an excellent writeup of the same issue in Moment: moment/moment#6015 (comment)
Details
DateTime.fromRFC2822("(".repeat(500000)) takes a couple minutes to complete.
Impact
Luxon's `DateTime.fromRFC2822() has quadratic (N^2) complexity on some specific inputs. This causes a noticeable slowdown for inputs with lengths above 10k characters. Users providing untrusted data to this method are therefore vulnerable to (Re)DoS attacks.
This is the same bug as Moment's GHSA-wc69-rhjr-hc9g
Workarounds
Limit the length of the input.
References
There is an excellent writeup of the same issue in Moment: moment/moment#6015 (comment)
Details
DateTime.fromRFC2822("(".repeat(500000))takes a couple minutes to complete.