Bruteforce protection can be bypassed with misconfigured proxy
CVE-2023-49792
Key Information:
- Vendor
Nextcloud
- Status
- Vendor
- CVE Published:
- 22 December 2023
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What is CVE-2023-49792?
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well as Nextcloud Enterprise Server prior to versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4; when a (reverse) proxy is configured as trusted proxy the server could be tricked into reading a wrong remote address for an attacker, allowing them executing authentication attempts than intended. Nextcloud Server versions 26.0.9 and 27.1.4 and Nextcloud Enterprise Server versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 contain a patch for this issue. No known workarounds are available.
Affected Version(s)
security-advisories >= 23.0.0, < 23.0.12.13 < 23.0.0, 23.0.12.13
security-advisories >= 24.0.0, < 24.0.12.9 < 24.0.0, 24.0.12.9
security-advisories >= 25.0.0, < 25.0.13.4 < 25.0.0, 25.0.13.4
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.