An endpoint used to display details of users listed in certain fields (such as ACLs) could be misused to dump basic user details (such as name, affiliation and email) in bulk.
[!TIP] If your instance allows everyone to create a user account, and you wish to truly restrict access to these user details, consider restricting user search to managers. You can find details on the newly introduced indico.conf setting
ALLOW_PUBLIC_USER_SEARCHin our documentation.
You should to update to Indico 3.3.7 as soon as possible. See the docs for instructions on how to update.
It is possible to restrict access to the affected endpoints (e.g. in the webserver config), but doing so would break certain form fields which could no longer show the details of the users listed in those fields, so upgrading instead is highly recommended.
If you have any questions or comments about this advisory:
This vulnerability was identified during a security assessment conducted as part of the Red Team Residency Program at RNP (Rede Nacional de Ensino e Pesquisa). The research and testing were performed by a security researcher working under RNP’s authorization and coordination. Special acknowledgment goes to the RNP Security Team, which provided the infrastructure, methodology, and ethical oversight for this work.
2.22.2.12.2.22.2.32.2.42.2.52.2.62.2.72.2.82.3+30 more3.3.7Exploitability
AV:NAC:LAT:NPR:LUI:NVulnerable System
VC:LVI:NVA:NSubsequent System
SC:LSI:NSA:NCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N