SQL Injection Attacks and Defense - 2009

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Testing for SQL Injection • Chapter 2 87 During the inference process Scrawlr sends only three injection strings, shown in Table 2.9. Table 2.9 Signatures Used by Scrawlr for SQL Injection Identification Testing Strings value’ OR value’ AND 5=5 OR ‘s’=’0 number-0 Scrawlr only detects verbose SQL injection errors where the server returns an HTTP 500 code page with the returned error message from the database. ■■ ■■ ■■ URL: https://h30406.www3.hp.com/campaigns/2008/wwcampaign/1-57C4K/ index.php?mcc=DNXA&jumpid=in_r11374_us/en/large/tsg/w1_0908_scrawlr_ redirect/mcc_DNXA Supported platform: Microsoft Windows Price: Free SQLiX SQLiX is a free Perl application coded by Cedric Cochin. It is a scanner that is able to crawl Web sites and detect SQL injection and blind SQL injection vulnerabilities. Figure 2.20 shows an example. Figure 2.20 SQLiX
88 Chapter 2 • Testing for SQL Injection In Figure 2.20, SQLiX is crawling and testing Victim Inc.’s Web site: perl SQLiX.pl -crawl=" http://www.victim.com/"-all -exploit As you can see from the screenshot, SQLiX crawled Victim Inc.’s Web site and automatically discovered several SQL injection vulnerabilities. However, the tool missed a vulnerable authentication form even when it was linked from the home page. SQLiX does not parse HTML forms and automatically sends POST requests. SQLiX provides the possibility of testing only one page (with the –url modifier) or a list of URLs contained in a file (the –file modifier). Other interesting options include –referer, –agent, and –cookie to include the Referer, User-Agent, and Cookie headers as a potential injection vector. Table 2.10 shows the injection strings SQLiX uses during the inference process. Table 2.10 Signatures Used by SQLiX for SQL Injection Identification Testing Strings %27 1 value’ AND ‘1’=’1 convert(varchar,0x7b5d) %2527 value/**/ value’ AND ‘1’=’0 convert(int,convert “ value/*!a*/ value’+’s’+’ (varchar,0x7b5d)) ‘+convert %22 value’/**/’ value’||’s’||’ (varchar,0x7b5d)+’ ‘+convert(int,convert value’ value’/*!a*/’ value+1 (varchar,0x7b5d))+’ User value& value AND 1=1 value’+1+’0 ‘ value& myVAR=1234 value AND 1=0 ■■ ■■ ■■ ■■ URL: www.owasp.org/index.php/Category:OWASP_SQLiX_Project Supported platform: Platform-independent, coded with Perl Requirement: Perl Price: Free Paros Proxy Paros Proxy is a Web assessment tool primarily used for manually manipulating Web traffic. It acts as a proxy and traps the requests made from the Web browser, allowing manipulation of the data sent to the server.
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Justin Clarke Lead Author and Techn
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Lead Author and Technical Editor Ju
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exploiting, and correcting software
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Dafydd Stuttard is the author of th
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Contents Chapter 1 What Is SQL Inje
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Contents xi LAPSE. ................
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Contents xiii Generic MySQL Binary
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Contents xv Chapter 8 Code-Level De
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Contents xvii Increase the Verbosit
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Contents xix Ingres Cheat Sheet....
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Chapter 1 What Is SQL Injection? So
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What Is SQL Injection? • Chapter
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execute the query against the datab
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Incorrectly Handled Query Assembly
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} } reader = cmd.ExecuteReader(); r
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Chapter 2 Testing for SQL Injection
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Testing for SQL Injection • Chapt
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Page 58 and 59: Testing for SQL Injection • Chapt
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Page 92 and 93: Figure 2.15 Exploitation Terminatin
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Page 116 and 117: Chapter 3 Reviewing Code for SQL In
Page 118 and 119: Reviewing Code for SQL Injection
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Page 138 and 139: Reviewing PL/SQL and T-SQL Code Rev
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Chapter 4 Exploiting SQL Injection
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Exploiting SQL Injection • Chapte
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Approach 3: Content-based Exploitin
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Error Messages in Oracle Exploiting
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MySQL Exploiting SQL Injection •
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Such a query will return output sim
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SELECT name,spare4 FROM sys.user$ w
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[+] Bruteforcing the sa password. T
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select user_name,web_password_raw f
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HTTP/DNS Exploiting SQL Injection
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Summary Exploiting SQL Injection
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Escalating Privileges Exploiting SQ
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Chapter 5 Blind SQL Injection Explo
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Blind SQL Injection Exploitation
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Common Blind SQL Injection Scenario
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1. Is the byte greater than 127? No
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Using Time-Based Techniques Blind S
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SELECT * FROM unknowntable UNION SE
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Figure 5.13 Extracting Database Log
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Summary Blind SQL Injection Exploit
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Chapter 6 Exploiting the Operating
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Exploiting the Operating System •
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[operating systems] multi(0)disk(0)
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Figure 6.13 Enabling CLR Integratio
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Oracle Exploiting the Operating Sys
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) c / ) ) ), bfilename('GETPWDIR',
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As expected, this creates sp.txt fi
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2 443 [+] Calling msfpayload3 to c
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DBMS_ADVISOR is probably the shorte
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EXECUTE IMMEDIATE q'!drop directory
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Microsoft SQL Server Exploiting the
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Figure 6.22 Creating an UNSAFE Bina
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Executing Operating System Commands
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Endnotes Exploiting the Operating S
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Chapter 7 Advanced Topics Solutions
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Using Case Variation Advanced Topic
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4. The application URL decodes the
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Advanced Topics • Chapter 7 323 D
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Advanced Topics • Chapter 7 325 I
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Advanced Topics • Chapter 7 327 w
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Advanced Topics • Chapter 7 329 N
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Advanced Topics • Chapter 7 331 m
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Advanced Topics • Chapter 7 333 1
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Using Hybrid Attacks Advanced Topic
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Exploiting Authenticated Vulnerabil
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Advanced Topics • Chapter 7 339
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Chapter 8 Code-Level Defenses Solut
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Code-Level Defenses • Chapter 8 3
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END; Execute immediate 'SELECT coun
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Validating Input in Java Code-Level
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UTL_SMTP.HELO(v_connection,'mailhos
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Summary Code-Level Defenses • Cha
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Chapter 9 Platform-Level Defenses S
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Platform-Level Defenses • Chapter
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Figure 9.3 Whitelist Rule to Patch
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Application Filters Platform-Level
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Use Strong Cryptography to Protect
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Additional Deployment Consideration
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Chapter 10 References Solutions in
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References • Chapter 10 417 For t
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References • Chapter 10 419 It is
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GROUP BY Statement References • C
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References • Chapter 10 423 you a
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References • Chapter 10 425 Table
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Blind SQL Injection Functions: Micr
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References • Chapter 10 429 the S
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Microsoft SQL Server 2005 Hashes Re
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References • Chapter 10 435 If MA
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TYPE oracle_loader DEFAULT DIRECTOR
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References • Chapter 10 441 When
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Table 10.20 Continued. Troubleshoot
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Enumerating Database Configuration
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Local File Access References • Ch
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References • Chapter 10 451 Infor
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■■ ■■ ■■ ■■ Referen
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Troubleshooting SQL Injection Attac
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A abstract syntax tree (AST), 125 a
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Index 461 confirming and terminatin
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Index 463 errors application error,
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Index 465 intercepting filters appl
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Index 467 APEX, 196-197 Oracle inte
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Index 469 mysql_query( ) function,
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Index 471 blind SQL injection funct
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Index 473 transformation functions,
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SQL Injection Attacks and Defense - 2009

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