Sage : Security Vulnerabilities, CVEs, (Gain Privilege)

Multiple XSS issues were discovered in Sage Enterprise Intelligence 2021 R1.1 that allow an attacker to execute JavaScript code in the context of users' browsers. The attacker needs to be authenticated to reach the vulnerable features. An issue is present in the Notify Users About Modification menu and the Notifications feature. A user can send malicious notifications and execute JavaScript code in the browser of every user who has enabled notifications. This is a stored XSS, and can lead to privilege escalation in the context of the application. (Another issue is present in the Favorites tab. The name of a favorite or a folder of favorites is interpreted as HTML, and can thus embed JavaScript code, which is executed when displayed. This is a self-XSS.)

In Sage 300 ERP (formerly accpac) through 6.8.x, the installer configures the C:\Sage\Sage300\Runtime directory to be the first entry in the system-wide PATH environment variable. However, this directory is writable by unprivileged users because the Sage installer fails to set explicit permissions and therefore inherits weak permissions from the C:\ folder. Because entries in the system-wide PATH variable are included in the search order for DLLs, an attacker could perform DLL search-order hijacking to escalate their privileges to SYSTEM. Furthermore, if the Global Search or Web Screens functionality is enabled, then privilege escalation is possible via the GlobalSearchService and Sage.CNA.WindowsService services, again via DLL search-order hijacking because unprivileged users would have modify permissions on the application directory. Note that while older versions of the software default to installing in %PROGRAMFILES(X86)% (which would allow the Sage folder to inherit strong permissions, making the installation not vulnerable), the official Sage 300 installation guides for those versions recommend installing in C:\Sage, which would make the installation vulnerable.