CVE-2016-10269 in LibTIFF
Summary
by MITRE
LibTIFF 4.0.7 allows remote attackers to cause a denial of service (heap-based buffer over-read) or possibly have unspecified other impact via a crafted TIFF image, related to "READ of size 512" and libtiff/tif_unix.c:340:2.
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Analysis
by VulDB Data Team • 11/15/2022
The vulnerability identified as CVE-2016-10269 resides within LibTIFF version 4.0.7, a widely used library for handling tagged image file format files across numerous operating systems and applications. This critical flaw manifests as a heap-based buffer over-read condition that can be exploited by remote attackers through the careful crafting of malicious TIFF image files. The vulnerability specifically occurs within the tif_unix.c source file at line 340, where a READ operation of size 512 is performed without adequate bounds checking, creating a scenario where the application attempts to access memory beyond the allocated buffer boundaries.
The technical nature of this vulnerability places it squarely within CWE-125: "Uninitialized Read" and CWE-787: "Out-of-bounds Write" categories, representing a classic buffer over-read condition that can lead to unpredictable behavior. When a malicious TIFF file is processed by an application relying on LibTIFF 4.0.7, the library's image parsing routine fails to validate the size of data being read from the file header, causing the heap memory management system to attempt accessing memory locations that may contain sensitive data or trigger application crashes. The impact extends beyond simple denial of service to potentially enabling more sophisticated attacks through information disclosure or arbitrary code execution depending on the specific implementation and memory layout.
From an operational perspective, this vulnerability affects a broad spectrum of applications that utilize LibTIFF for image processing including web browsers, image viewers, document management systems, and various enterprise applications. The remote attack vector means that adversaries can exploit this vulnerability without requiring local system access, making it particularly dangerous in web-facing applications. The heap-based nature of the over-read creates opportunities for attackers to potentially extract sensitive information from adjacent memory regions, though the exact impact may vary based on memory layout and application context. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1059: "Command and Scripting Interpreter" and T1068: "Exploitation for Privilege Escalation" when combined with other exploitation vectors.
Mitigation strategies for CVE-2016-10269 primarily focus on immediate patching of affected LibTIFF versions, with the vulnerability being resolved in LibTIFF 4.0.8 and subsequent releases. Organizations should prioritize updating their systems and applications that depend on LibTIFF to versions containing the fix, which typically involves implementing proper bounds checking and memory validation routines. Additionally, deploying input validation measures at network boundaries, implementing sandboxing techniques for image processing operations, and monitoring for suspicious file upload activities can provide defense-in-depth protection. Security teams should also consider implementing automated vulnerability scanning tools to identify systems running vulnerable versions of LibTIFF and establish incident response procedures for potential exploitation attempts. The fix addresses the root cause by ensuring that all memory access operations respect buffer boundaries and implement proper validation of image file headers before processing potentially malicious content.