Medium · published September 23, 2021
CVSS calls it medium at 5.3. It is confirmed in active exploitation. It sits in the 98.9th percentile for exploit probability.
⚠️ A sneaky URI normalization flaw in vCenter Server can let attackers peek behind the curtain! 🎭 Think of it as a restaurant with a hidden backdoor that staff can use to sneak in when everyone thinks they’re just outside — this flaw allows bad actors to access internal endpoints without needing a proper reservation! An attacker with access to port 443 could bypass the proxy, letting them access sensitive internal resources in your vCenter Server. This could be particularly damaging as it opens the door to unauthorized actions, potentially leading to data breaches or further exploits.
Think of it as a restaurant with a hidden backdoor that staff can use to sneak in when everyone thinks they’re just outside — this flaw allows bad actors to access internal endpoints without needing a proper reservation! CVE-2021-22017 involves improper URI normalization in Rhttproxy used by vCenter Server, allowing for potential bypass of security measures and access to internal endpoints by a malicious actor with network access.
An attacker with access to port 443 could bypass the proxy, letting them access sensitive internal resources in your vCenter Server. This could be particularly damaging as it opens the door to unauthorized actions, potentially leading to data breaches or further exploits. To mitigate this vulnerability, ensure you update your vCenter Server to the latest version where the issue is patched. Additionally, regularly audit your network access controls to limit exposure to port 443, and consider implementing additional logging to detect any unusual access attempts. You’ve got this! With these steps, you’ll shore up your defenses and keep your vCenter Server safe. 🛡️