312-50V9 · Question #545
Joseph was the Web site administrator for the Mason Insurance in New York, who's main Web the Web site. One night, Joseph received an urgent phone call from his friend, Smith. According to Smith, the
The correct answer is C. DNS poisoning. The scenario describes DNS cache poisoning, where an attacker corrupted external DNS resolver caches to redirect outside visitors to a defaced page while the internal network used its own unaffected DNS servers.
Question
Joseph was the Web site administrator for the Mason Insurance in New York, who's main Web the Web site. One night, Joseph received an urgent phone call from his friend, Smith. According to Smith, the main Mason Insurance web site had been vandalized! All of its normal content was removed and replaced with an attacker's message ''Hacker Message: You are dead! Freaks! From his office, which was directly connected to Mason Insurance's internal network, Joseph surfed to the Web site using his laptop. In his browser, the Web site looked completely intact. No changes were apparent. Joseph called a friend of his at his home to help troubleshoot the problem. The Web site appeared defaced when his friend visited using his DSL connection. So, while Smith and his friend could see the defaced page, Joseph saw the intact Mason Insurance web site. To help make sense of this problem, Joseph decided to access the Web site using his dial-up ISP. He disconnected his laptop from the corporate internal network and used his modem to dial up the same ISP used by Smith. After his modem connected, he quickly typed H@cker Mess@ge:
Y0u @re De@d! Fre@ks! After seeing the defaced Web site, he disconnected his dial-up line, reconnected to the internal network, and used Secure Shell (SSH) to log in directly to the Web server. He ran Tripwire against the entire Web site, and determined that every system file and all the Web content on the server were intact. How did the attacker accomplish this hack?
Options
- AARP spoofing
- BSQL injection
- CDNS poisoning
- DRouting table injection
How the community answered
(43 responses)- A21% (9)
- B9% (4)
- C65% (28)
- D5% (2)
Why each option
The scenario describes DNS cache poisoning, where an attacker corrupted external DNS resolver caches to redirect outside visitors to a defaced page while the internal network used its own unaffected DNS servers.
ARP spoofing operates at Layer 2 within a local network segment and cannot selectively affect external Internet users while leaving internal users unaffected.
SQL injection modifies data stored in the web application's database, which would cause all visitors regardless of location to see the same defaced content.
DNS cache poisoning occurs when an attacker injects fraudulent DNS records into a resolver's cache, causing users querying that resolver to be directed to a malicious IP address instead of the legitimate one. Because Joseph's laptop was on Mason Insurance's internal network, it resolved the domain through the company's internal DNS servers, which were not poisoned, so he saw the real site. External users such as Smith, whose systems relied on ISP or public DNS resolvers that had been poisoned, were redirected to the attacker's defaced page.
Routing table injection manipulates router path decisions at the network layer and would typically disrupt broad connectivity rather than selectively redirecting web content based on whether a user is internal or external.
Concept tested: DNS cache poisoning attack mechanics
Source: https://learn.microsoft.com/en-us/windows-server/networking/dns/dns-top
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