CVE-2020-9995: 
macOS vulnerability analysis and mitigation

CVE-2020-9995 is a security vulnerability discovered in macOS Server's Profile Manager component that affects macOS Big Sur. The vulnerability was disclosed and patched in macOS Server 5.11, released on December 14, 2020. The issue involved improper parsing of URLs that could potentially lead to open redirect or cross-site scripting attacks (Apple Support).

The vulnerability stemmed from an issue in the parsing of URLs within the Profile Manager component of macOS Server. The security flaw was addressed by implementing improved input validation mechanisms. The vulnerability was discovered by security researchers Rajpal Arora (@whacktohack) and Rohan Sharma (r0hanSH) (Apple Support).

When exploited, the vulnerability could allow an attacker to process maliciously crafted URLs, potentially leading to open redirect attacks or cross-site scripting. These types of attacks could potentially allow unauthorized access or execution of malicious scripts in the context of the vulnerable application (Apple Support).

The vulnerability required processing a maliciously crafted URL to be exploited. The attack vector involved manipulating URL parsing mechanisms in the Profile Manager component (Apple Support).

Apple addressed this vulnerability by releasing macOS Server 5.11 on December 14, 2020. The fix implemented improved input validation for URL parsing. Users are advised to update to this version or later to protect against potential exploitation (Apple Support).