发布时间: 2025年9月5日
修改时间: 2025年9月12日
A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.
| NVD | openEuler | |
|---|---|---|
| Confidentiality | High | High |
| Attack Vector | Network | Network |
| CVSS评分 | 8.8 | 8.8 |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| Scope | Unchanged | Unchanged |
| Integrity | High | High |
| User Interaction | None | None |
| Availability | High | High |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2025-2850 | libssh security update | 2025年9月25日 |
| KylinSec-SA-2025-2863 | libssh security update | 2025年9月12日 |
| 产品 | 包 | 状态 |
|---|---|---|
| KY3.4-5A | libssh | Fixed |
| V6 | libssh | Fixed |
| KY3.5.3 | libssh | Fixed |
| KY3.5.2 | libssh | Fixed |
