Stats about security flaws in the linux kernel

To test he new "this probably should be an f string" checker, they generated a list of the most popular python repositories on Github by using Github's topic search API [with this script].

With the rule:

GIVEN a string does not have an f prefix
WHEN the string contains {foo}
AND foo is in scope
THEN it’s probably missing an f prefix

And minimizing the false positive such as

• The string is later used in an str.format(…) call or str.format_map(…)
• The string is used in behave style test `@when('{user} accesses {url}.')

La Cour estime en outre que les avantages mis en avant dans l’évaluation préalable du contrat public-privé « ne se sont pas matérialisés, tandis que la préfecture de police a dû faire face à des surcoûts », relevant à ce titre ce type d'incongruité :

« À titre d’exemple, la livraison des travaux en retard n’a pas eu pour effet d’infliger une pénalité au prestataire mais, au contraire, de lui verser une indemnité de 1,4 M€. »

De plus, et « pendant plus de dix ans, la réalisation du PVPP n’a pas donné lieu aux mises en concurrence qui, en principe, permettent de réduire les coûts ».

Oh boy... that's pretty scary.
To deliberately introduce security holes, sometimes minor changes are enough. For example replace "==" (comparison sign) by "=" (assignment). These "attacks" are visible to a trained eye.

But what happens if the eye can't see anymore? With Unicode, it is possible to use characters that look like our Latin alphabet, but are not, or worse change the writing order (left-right) so that the text is displayed one way in the text editor, while the compiler will interpret it differently. This opens up the possibility of inserting security holes that are almost impossible to see, even if you have the source code in front of you in your text editor.
(For an example of left-right inversion, go to this page: https://sebsauvage.net/wiki/ and look for my email address in the page: It shows up normally, but if you look at the html source, it shows up as a different text).

I think it would be interesting if text editors had an option to display in a particular color everything that is not purely "Latin text" (0000-024F), as well as Unicode characters that cause changes (backspace, change of direction).

Proof-of-concept of this attack in different languages can be seen here: https://github.com/nickboucher/trojan-source

(from https://sebsauvage.net/links/?QRVnDw)

We can develop an extension for each editor that highlights these characters easily !

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• I bet he's thinking about other women
• log4j log4j log4j log4j log4j log4j log4j log4j log4j log4j log4j log4j

Through config files

2FA Joke