Stack Out-of-Bounds Write in gfs2-utils savemeta

Executive Summary

This is a stack out-of-bounds write vulnerability in gfs2-utils, specifically in the savemeta function. It occurs when processing crafted GFS2 filesystem images where the height value from on-disk inode metadata is used as a loop bound without bounds checking. This causes a stack buffer overflow that may lead to arbitrary code execution.

Useful 0 Not Useful 0

Detection Guidance

Detecting this vulnerability requires checking for the presence of gfs2-utils and examining filesystem images processed by savemeta. Look for gfs2-utils installations and review logs for savemeta usage. No direct detection commands are provided in the resources, but monitoring for crashes or unusual behavior when processing GFS2 images may indicate exploitation.

Useful 0 Not Useful 0

Impact Analysis

Exploitation requires local access and user interaction, such as an administrator running savemeta on a crafted GFS2 image. Successful exploitation could allow arbitrary code execution, leading to potential system compromise, data theft, or further attacks. The vulnerability has a CVSS score of 7.0, indicating high impact on confidentiality, integrity, and availability.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could lead to unauthorized code execution, potentially causing data breaches or system compromises. Such incidents may violate compliance requirements under GDPR or HIPAA, depending on the data involved. Organizations should mitigate risks by avoiding untrusted images and using isolated environments.

Useful 0 Not Useful 0

Mitigation Strategies

Avoid running gfs2-utils savemeta on untrusted GFS2 filesystem images. Process untrusted images in isolated environments like containers or VMs. Disable automatic fsck at boot for GFS2 filesystems by setting fs_passno to 0 in /etc/fstab. Update gfs2-utils to a patched version if available.

Useful 0 Not Useful 0