CVE-2016-8710 in libbpg
Summary
by MITRE
An exploitable heap write out of bounds vulnerability exists in the decoding of BPG images in Libbpg library. A crafted BPG image decoded by libbpg can cause an integer underflow vulnerability causing an out of bounds heap write leading to remote code execution. This vulnerability can be triggered via attempting to decode a crafted BPG image using Libbpg.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 05/14/2026
The vulnerability identified as CVE-2016-8710 represents a critical heap-based buffer overflow condition within the Libbpg library implementation for decoding BPG (Better Portable Graphics) image format files. This flaw exists in the image decoding process where the library fails to properly validate input parameters during BPG file parsing, creating a scenario where maliciously crafted image data can trigger unexpected memory operations. The vulnerability specifically manifests during the decoding phase when the library processes image dimensions and memory allocation parameters, making it particularly dangerous as it can be exploited through simple image file manipulation without requiring complex attack vectors.
The technical root cause of this vulnerability stems from an integer underflow condition that occurs when processing BPG image metadata, particularly in the handling of image dimensions and memory allocation calculations. When a crafted BPG file is processed, the library's decoding routine performs arithmetic operations on unsigned integers that can result in underflow conditions, leading to incorrect memory allocation sizes and subsequent out-of-bounds heap writes. This vulnerability maps directly to CWE-129, which describes improper validation of length parameters, and CWE-787, which covers out-of-bounds write conditions. The integer underflow creates a situation where the calculated memory buffer size becomes negative or significantly smaller than expected, allowing subsequent write operations to overwrite adjacent heap memory regions.
The operational impact of this vulnerability extends far beyond simple image processing, as it enables remote code execution capabilities when exploited through web applications or services that utilize Libbpg for image handling. Attackers can craft malicious BPG files that, when processed by vulnerable systems, will cause the heap memory corruption to occur at predictable locations, potentially allowing for arbitrary code execution with the privileges of the affected application. This vulnerability is particularly concerning in web environments where users might unknowingly trigger the exploitation by visiting malicious websites or downloading infected files, as the exploitation requires no user interaction beyond the simple act of image decoding. The vulnerability affects systems that implement the Libbpg library for image processing, including web servers, image processing applications, and any software that relies on this library for BPG image handling.
Mitigation strategies for CVE-2016-8710 should focus on immediate patching of the Libbpg library to address the integer underflow condition and implement proper input validation for all image format parameters. Organizations should also consider implementing strict input validation and sanitization measures for all image file processing, including the use of sandboxed environments for image handling operations. Additionally, network-level protections such as web application firewalls can be configured to detect and block suspicious image file patterns that might indicate crafted malicious files. The ATT&CK framework categorizes this vulnerability under T1203, which describes exploitation of remote services, and T1059, which covers command and control communications, as attackers might use this vulnerability to establish persistent access to compromised systems. System administrators should also implement monitoring for unusual memory allocation patterns and heap corruption indicators that might signal exploitation attempts, while maintaining up-to-date security patches and vulnerability management processes to prevent similar issues in other image processing libraries.