Headline
CVE-2023-37266: Weak JWT secrets
CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as root on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit 705bf1f. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can’t, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.
Package
gomod github.com/IceWhaleTech/CasaOS (Go)
Affected versions
< 0.4.4
Description
Impact
Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as root on CasaOS instances.
Patches
The problem was addressed by improving the validation of JWTs in 705bf1f. This patch is part of CasaOS 0.4.4.
Workarounds
Users should upgrade to CasaOS 0.4.4. If they can’t, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.
References
- 705bf1f
Related news
Two critical security flaws discovered in the open-source CasaOS personal cloud software could be successfully exploited by attackers to achieve arbitrary code execution and take over susceptible systems. The vulnerabilities, tracked as CVE-2023-37265 and CVE-2023-37266, both carry a CVSS score of 9.8 out of a maximum of 10. Sonar security researcher Thomas Chauchefoin, who discovered the bugs,
### Impact Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances. ### Patches The problem was addressed by improving the validation of JWTs in 705bf1f. This patch is part of CasaOS 0.4.4. ### Workarounds Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly. ### References - 705bf1f