SANS Stormcast Thursday, August 14th, 2025: Equation Editor; Kerberos Patch; XZ-Utils Backdoor; ForitSIEM/FortiWeb patches

SANS Internet Stormcenter Daily Cyber Security Podcast (Stormcast)

CVE-2017-11882 Will Never Die
The (very) old equation editor vulnerability is still being exploited, as this recent sample analyzed by Xavier shows. The payload of the Excel file attempts to download and execute an infostealer to exfiltrate passwords via email.
https://isc.sans.edu/diary/CVE-2017-11882%20Will%20Never%20Die/32196
Windows Kerberos Elevation of Privilege Vulnerability
Yesterday, Microsoft released a patch for a vulnerability that had already been made public. This vulnerability refers to the privilege escalation taking advantage of a path traversal issue in Windows Kerberos affecting Exchange Server in hybrid mode.
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53779
Persistent Risk: XZ Utils Backdoor Still Lurking in Docker Images
Some old Debian Docker images containing the xz-utils backdoor are still available for download from Docker Hub via the official Debian account.
https://www.binarly.io/blog/persistent-risk-xz-utils-backdoor-still-lurking-in-docker-images
FortiSIEM / FortiWeb Vulnerablities
Fortinet patched already exploited vulnerabilities in FortiWeb and FortiSIEM
https://fortiguard.fortinet.com/psirt/FG-IR-25-152
https://fortiguard.fortinet.com/psirt/FG-IR-25-448