HTB Redeemer

Redis

Redis（Remote Dictionary Server）是一个开源的内存型非关系型（NoSQL）键值对数据库，以高性能、低延迟和灵活性著称，广泛用于缓存、会话管理和实时数据处理。

核心特点

• 内存存储：数据存储在内存，读写速度极快（微秒级）。
• 键值存储：支持多种数据类型，如字符串、哈希、列表、集合、有序集合等。
• 持久化：支持将数据保存到磁盘（RDB 快照或 AOF 日志）。
• 高可用性：支持主从复制、哨兵（Sentinel）和集群（Cluster）模式。
• 多功能：可用作数据库、缓存、消息队列等。

Which TCP port is open on the machine?

• 6379

计算机上打开的端口上运行的是哪个服务？

• redis

What type of database is Redis? Choose from the following options: (i) In-memory Database, (ii) Traditional Database

• In-memory Database

Which command-line utility is used to interact with the Redis server? Enter the program name you would enter into the terminal without any arguments.

• redis-cli

Which flag is used with the Redis command-line utility to specify the hostname?

• -h

Once connected to a Redis server, which command is used to obtain the information and statistics about the Redis server?

• info

What is the version of the Redis server being used on the target machine?

• 5.0.7

Which command is used to select the desired database in Redis?

• select
• SELECT 命令用于切换到指定的数据库（Redis 默认支持多个数据库，编号从 0 开始，默认使用 db0）。

SELECT 1
OK

How many keys are present inside the database with index 0?

• info keyspace
• keys=4,expires=0,avg_ttl=0：描述 db0 的键数量、过期键数量和平均生存时间。

Which command is used to obtain all the keys in a database?

• keys *

Submit root flag

• 在上一个命令之后输入get flag即可