CVE-2023-29020 – @fastify/passport

Package

Manager: npm
Name: @fastify/passport
Vulnerable Version: >=0 <1.1.0 || >=2.0.0 <2.3.0

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.0007 pctl0.21922

Details

CSRF token fixation in fastify-passport The [CSRF](https://owasp.org/www-community/attacks/csrf) protection enforced by the `@fastify/csrf-protection` library, when combined with `@fastify/passport`, can be bypassed by network and same-site attackers. ## Details `fastify/csrf-protection` implements the [synchronizer token pattern](https://cheatsheetseries.owasp.org/cheatsheets/Cross-Site_Request_Forgery_Prevention_Cheat_Sheet.html#synchronizer-token-pattern) (using plugins `@fastify/session` and `@fastify/secure-session`) by storing a random value used for CSRF token generation in the `_csrf` attribute of a user's session. The `@fastify/passport` library does not clear the session object upon authentication, preserving the `_csrf` attribute between pre-login and authenticated sessions. Consequently, CSRF tokens generated before authentication are still valid. Network and [same-site attackers](https://canitakeyoursubdomain.name/) can thus obtain a CSRF token for their pre-session, fixate that pre-session in the victim's browser via cookie tossing, and then perform a CSRF attack after the victim authenticates. ## Fix As a solution, newer versions of `@fastify/passport` include the configuration options * `clearSessionOnLogin (default: true)` and * `clearSessionIgnoreFields (default: ['session'])` to clear all the session attributes by default, preserving those explicitly defined in `clearSessionIgnoreFields`. ## Credits * Pedro Adão (@pedromigueladao), [Instituto Superior Técnico, University of Lisbon](https://tecnico.ulisboa.pt/) * Marco Squarcina (@lavish), [Security & Privacy Research Unit, TU Wien](https://secpriv.wien/)

Metadata

Created: 2023-04-21T22:32:47Z
Modified: 2023-04-24T15:56:27Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/04/GHSA-2ccf-ffrj-m4qw/GHSA-2ccf-ffrj-m4qw.json
CWE IDs: ["CWE-352"]
Alternative ID: GHSA-2ccf-ffrj-m4qw
Finding: F076
Auto approve: 1