CVE-2026-33488 in AVideo
Summary
by MITRE • 03/23/2026
WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `createKeys()` function in the LoginControl plugin's PGP 2FA system generates 512-bit RSA keys, which have been publicly factorable since 1999. An attacker who obtains a target user's public key can factor the 512-bit RSA modulus on commodity hardware in hours, derive the complete private key, and decrypt any PGP 2FA challenge issued by the system — completely bypassing the second authentication factor. Additionally, the `generateKeys.json.php` and `encryptMessage.json.php` endpoints lack any authentication checks, exposing CPU-intensive key generation to anonymous users. Commit 00d979d87f8182095c8150609153a43f834e351e contains a patch.
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Analysis
by VulDB Data Team • 03/28/2026
The vulnerability described in CVE-2026-33488 affects the WWBN AVideo platform version 26.0 and earlier, specifically targeting the LoginControl plugin's PGP two-factor authentication system. This represents a critical security flaw that fundamentally undermines the authentication security model of the platform. The core issue lies in the implementation of the createKeys() function which generates RSA keys with only 512-bit modulus, a key size that has been completely broken and publicly factorable since 1999 according to cryptographic standards. This weakness directly maps to CWE-327, which addresses the use of weak cryptographic algorithms, and CWE-326, which covers inadequate encryption strength. The vulnerability creates a scenario where an attacker with access to a user's public key can perform factorization on commodity hardware within hours, completely compromising the security of the two-factor authentication system.
The operational impact of this vulnerability extends beyond simple authentication bypass to encompass complete system compromise. When an attacker successfully factors the 512-bit RSA modulus, they gain access to the complete private key, enabling them to decrypt any PGP 2FA challenges issued by the system. This effectively nullifies the second authentication factor, allowing unauthorized access to user accounts. The vulnerability creates a significant attack surface that aligns with ATT&CK technique T1566, specifically the use of credential dumping and authentication bypass methods. The compromised authentication system could enable attackers to escalate privileges, access sensitive user data, and potentially move laterally within the network if the platform integrates with other systems. The exposure of the private keys through this weakness fundamentally breaks the cryptographic security assumptions that protect user accounts.
Additional security concerns arise from the lack of authentication checks on the generateKeys.json.php and encryptMessage.json.php endpoints, which creates a resource exhaustion vulnerability. This flaw allows anonymous users to access CPU-intensive key generation processes, potentially leading to denial of service conditions and excessive resource consumption. The absence of proper access controls on these endpoints directly relates to CWE-284, which addresses improper access control mechanisms, and CWE-434, which covers insecure file upload vulnerabilities. Attackers could exploit this by flooding the system with key generation requests, consuming significant computational resources and potentially causing service disruption for legitimate users. This weakness creates a vector for both authentication bypass and resource exhaustion attacks, amplifying the overall impact of the vulnerability. The patch referenced in commit 00d979d87f8182095c8150609153a43f834e351e would address both the cryptographic weakness by implementing proper key sizes and the authentication bypass by adding necessary access controls to the endpoints, thereby restoring the platform's security posture and ensuring proper protection of user credentials and authentication systems.