方法1 pg_read_file --注意: 在早期的 PostgreSQL 版本中,pg_read_file 不允许使用绝对路径selectpg_read_file('/etc/passwd');--单引号被转义的情况下使用select/**/PG_READ_FILE($$/etc/passwd$$) 方法2 createtabletestf0x(t TEXT);copytestf0xfrom'/etc/passwd';select*fromtestf0x limit1offset0...
select pg_read_file('PG_VERSION', 0, 200);,这个在老版本中还可以通过绝对路径进行读取 SHOW server_version_num;,因为我这边装的是postgres:9.5-beta1,所以这边版本号为90500 SELECT current_setting('server_version_num');,因为我这边装的是postgres:9.5-beta1,所以这边版本号为90500 获取配置信息 下面两...
先查看postgresql支持的扩展语言:select * from pg_language; Postgresql默认支持C,可以自己编译so库去创建执行命令的函数利用。 5. 漏洞利用 5.1 CVE-2019-9193:PostpreSQL 9.3-11.2 允许经过身份验证的superuser或者拥有pg_read_server_files权限的用户执行任意命令: 代码语言:javascript 代码运行次数:0 运行 AI代码...
(1 row) 但是这个pg_read_file()功能有局限性。 postgres=# select pg_read_file('/etc/passwd'); ERROR: absolute path not allowed postgres=# select pg_read_file('../../../../etc/passwd'); ERROR: path must be in or below the current directory 我们还可以在其中创建一个新表和COPY磁盘...
Read_Master_Log_Pos: 441 Relay_Log_File: db52-relay-bin.000002 Relay_Log_Pos: 315 Relay_Master_Log_File: db51.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
2、打开文件PathNameOpenFile,并记录VFD到md_seg_fds中。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 /* * Reject attempts to read non-local temporary relations; we would be * likely to get wrong data since we have no visibility into the owning * session's local buffers. */ if (REL...
《PostgreSQL pg_stat_ pg_statio_ 统计信息(scan,read,fetch,hit)源码解读》 postgres=# \dv pg_stat* ListofrelationsSchema|Name|Type|Owner---+---+---+---pg_catalog | pg_stat_activity |view| postgres pg_catalog | pg_stat_all_indexes |view| postgres pg_catalog | pg...
The idea behind the patch is to store all the files making up a PostgreSQL cluster securely on disk in encrypted format (data-at-rest encryption) and then decrypt blocks as they are read from disk. This only requires that the database is initialized with encryption in mind and that the ke...
与dir、filepath互斥,三者只能设置其中一个。 READABLE外部表会在导入数据时将含有这一前缀的所有OSS文件导入。 如果指定prefix=test/filename,以下文件都会被导入: test/filename test/filenamexxx test/filename/aa test/filenameyyy/aa test/filenameyyy/bb/aa ...
ERROR: could not read block 3 in file "base/16397/1255": read only 0 of 8192 bytes zjh@test=# select * from pg_proc; -- 因为系统表通过BKI初始化,所以定义存在 oid | proname | pronamespace | proowner | prolang | procost | prorows | provariadic | prosupport | prokind | prosecdef...