full-disclosure - [FD] Missing Trust Validation in Visual Studio's VSIX Installer

Open Source and information security mailing list archives

Date: Wed, 26 Aug 2020 13:37:21 +0000
From: "Ostovary, Daniel" <daniel.ostovary@...icon.eu>
To: "fulldisclosure@...lists.org" <fulldisclosure@...lists.org>
Subject: [FD] Missing Trust Validation in Visual Studio's VSIX Installer

Hi,

we have recently discovered a vulnerability in the VSIX Installer of Visual Studio. More specifically, the vulnerability existed in the validation of VSIX package signatures. This vulnerability allowed attackers

*        to 'revive' expired code-signing certificates for VSIX package signatures and

*        to maliciously modify timestamps when intercepting timestamp requests for VSIX package signatures.

For more details see here:
https://about.signpath.io/blog/2020/08/26/on-the-importance-of-trust-validation.html

Best regards,
SignPath

_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: http://seclists.org/fulldisclosure/

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives