High · published October 14, 2025
⚡ Local privilege escalation is on the menu! An authorized attacker can exploit improper link resolution in .NET to elevate their access like a sneaky guest slipping into the VIP area at a concert. 🎤 Think of it like a restaurant where the waiter mistakenly gives a regular patron access to the exclusive kitchen just because they know the head chef. This vulnerability allows someone with some existing access to push their way into privileged areas they shouldn't be in. If an attacker successfully exploits this flaw, they could gain elevated privileges, allowing them to execute arbitrary commands or access sensitive files—like a backstage pass that lets them roam free through the entire venue. This could lead to data theft, unauthorized system changes, or even a full system compromise, which could be absolutely devastating!
Think of it like a restaurant where the waiter mistakenly gives a regular patron access to the exclusive kitchen just because they know the head chef. This vulnerability allows someone with some existing access to push their way into privileged areas they shouldn't be in. This vulnerability arises from improper link resolution before file access, allowing an authorized user to follow symbolic links to files they normally shouldn't access, effectively bypassing security controls.
If an attacker successfully exploits this flaw, they could gain elevated privileges, allowing them to execute arbitrary commands or access sensitive files—like a backstage pass that lets them roam free through the entire venue. This could lead to data theft, unauthorized system changes, or even a full system compromise, which could be absolutely devastating! To mitigate this risk, ensure that the .NET framework is updated to the latest version where this vulnerability is patched. Implement strict access controls to limit who can initiate link following and regularly audit file permissions to ensure they align with your security policies. You've got this! With a few updates and adjustments, you can keep your system secure and robust. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| microsoft/.net | ≥ 8.0.0, < 8.0.21 | 8.0.21 |
| microsoft/.net | ≥ 9.0.0, < 9.0.10 | 9.0.10 |