Stack Buffer Overflow Vulnerability Analysis and Fix for EXIF Orientation Parsing

Vulnerability Overview This vulnerability involves a stack buffer overflow caused by an incorrect check of the property size when parsing the EXIF Orientation attribute. Specifically, the function fails to validate the property size while processing the EXIF Orientation field. This allows an attacker to construct a malicious TIFF file, causing the function to write bytes beyond a fixed stack buffer. This overwrites other data on the stack (such as return addresses), enabling arbitrary code execution. Scope of Impact Affected Component: The function in . Affected Versions: Versions prior to commit . Potential Risk: Attackers can exploit this vulnerability to execute arbitrary code, potentially leading to complete system control. Remediation 1. Add property size checks: Before calling , verify whether the property size exceeds the size of the fixed stack buffer. 2. Reject oversized properties: If the property size exceeds the limit, reject processing immediately to prevent stack overflow. 3. Implement the fix: Add validation for property size within the function to ensure that data exceeding the buffer bounds is not written. POC Code Summary This vulnerability leads to a stack buffer overflow due to the failure to correctly validate the size of the EXIF Orientation attribute. Attackers can exploit this flaw to execute arbitrary code. The remediation includes adding property size checks and rejecting oversized properties to ensure that no data exceeding the buffer bounds is written.

Goal Reached Thanks to every supporter — we hit 100%!

Stack Buffer Overflow Vulnerability Analysis and Fix for EXIF Orientation Parsing

More from this source