BIT-mastodon-2024-25618

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Import Source
https://github.com/bitnami/vulndb/tree/main/data/mastodon/BIT-mastodon-2024-25618.json
JSON Data
https://api.osv.dev/v1/vulns/BIT-mastodon-2024-25618
Aliases
Published
2024-03-31T18:21:20.227Z
Modified
2024-05-23T01:41:29.360880Z
Summary
[none]
Details

Mastodon is a free, open-source social network server based on ActivityPub. Mastodon allows new identities from configured authentication providers (CAS, SAML, OIDC) to attach to existing local users with the same e-mail address. This results in a possible account takeover if the authentication provider allows changing the e-mail address or multiple authentication providers are configured. When a user logs in through an external authentication provider for the first time, Mastodon checks the e-mail address passed by the provider to find an existing account. However, using the e-mail address alone means that if the authentication provider allows changing the e-mail address of an account, the Mastodon account can immediately be hijacked. All users logging in through external authentication providers are affected. The severity is medium, as it also requires the external authentication provider to misbehave. However, some well-known OIDC providers (like Microsoft Azure) make it very easy to accidentally allow unverified e-mail changes. Moreover, OpenID Connect also allows dynamic client registration. This issue has been addressed in versions 4.2.6, 4.1.14, 4.0.14, and 3.5.18. Users are advised to upgrade. There are no known workarounds for this vulnerability.

References

Affected packages

Bitnami / mastodon

Package

Name
mastodon
Purl
pkg:bitnami/mastodon

Severity

  • 4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N CVSS Calculator

Affected ranges

Type
SEMVER
Events
Introduced
4.2.0
Fixed
4.2.6
Introduced
4.1.0
Fixed
4.1.14
Introduced
4.0.0
Fixed
4.0.14
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.5.18