为管理SVM报告的SSH服务器公共密钥太小漏洞
适用场景
- ONTAP 9
- Qualys扫描程序
- SSH
问题描述
安全扫描程序会为管理SVM中的某个接口标记以下漏洞:
SSH Server Public Key Too Small
QID: 38738
THREAT:
The SSH protocol (Secure Shell) is a method for secure remote login from one computer to another.
The SSH Server is using a small Public Key.
Best practices require that RSA digital signatures be 2048 or more bits long to provide adequate security.
Key lengths of 1024 are acceptable through 2013, but since 2011 they are considered deprecated.
IMPACT:
A man-in-the-middle attacker can exploit this vulnerability to record the communication to decrypt the session key and even the messages
SOLUTION:
DSA keys and RSA keys shorter than 2048 bits are considered vulnerable. It is recommended to install a RSA public key length of at least 2048 bits
or greater, or to switch to ECDSA or EdDSA