Sakai kernel-impl: predictable PRNG used to generate server‑side encryption key in EncryptionUtilityServiceImpl

TRUNG BÌNH 5.9CVE-2025-62710 · GHSA-gr7h-xw4f-wh86 · Công bố 22/10/2025 · cập nhật 08/10/2026

Tóm tắt nhanh

CVE-2025-62710 là lỗ hổng mức TRUNG BÌNH (CVSS 5.9) ảnh hưởng org.sakaiproject.kernel:sakai-kernel-impl, sakai (sakailms).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.20%, cao hơn 9.9% các lỗ hổng khác.
Cách xử lý: cập nhật lên 23.5 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
org.sakaiproject.kernel:sakai-kernel-impl Maven	`≤ 23.3`	Chưa có bản vá
sakai sakailms	`< 23.5`	`23.5`

Mô tả

Impact

EncryptionUtilityServiceImpl initialized an AES256TextEncryptor password (serverSecretKey) using RandomStringUtils with the default java.util.Random. java.util.Random is a non‑cryptographic PRNG and can be predicted from limited state/seed information (e.g., start time window), substantially reducing the effective search space of the generated key. An attacker who can obtain ciphertexts (e.g., exported or at‑rest strings protected by this service) and approximate the PRNG seed can feasibly reconstruct the serverSecretKey and decrypt affected data.

Patches

SAK-49866 is patched in Sakai 23.5, 25.0, and trunk.

Credits

Reported by Suraj Gangwar.
Patched by Sam Ottenhoff (Longsight).

Mô tả của NVD

Sakai is a Collaboration and Learning Environment. Prior to versions 23.5 and 25.0, EncryptionUtilityServiceImpl initialized an AES256TextEncryptor password (serverSecretKey) using RandomStringUtils with the default java.util.Random. java.util.Random is a non‑cryptographic PRNG and can be predicted from limited state/seed information (e.g., start time window), substantially reducing the effective search space of the generated key. An attacker who can obtain ciphertexts (e.g., exported or at‑rest strings protected by this service) and approximate the PRNG seed can feasibly reconstruct the serverSecretKey and decrypt affected data. SAK-49866 is patched in Sakai 23.5, 25.0, and trunk.