CVE-2015-7554 – This vulnerability in libtiff allows attackers ... (How to Fix)

Q: What is the severity of CVE-2015-7554?

CVE-2015-7554 has a CVSS score of 9.8 (CRITICAL). This vulnerability in libtiff allows attackers to cause a denial of service (crash) or potentially execute arbitrary code by providing specially crafted TIFF image files. It affects any application that uses libtiff to process TIFF images, including image viewers, document processors, and web applications that handle image uploads.

📋 TL;DR

This vulnerability in libtiff allows attackers to cause a denial of service (crash) or potentially execute arbitrary code by providing specially crafted TIFF image files. It affects any application that uses libtiff to process TIFF images, including image viewers, document processors, and web applications that handle image uploads.

💻 Affected Systems

Products:

libtiff
applications using libtiff library

Versions: libtiff 4.0.6 and earlier versions

Operating Systems: Linux, Windows, macOS, Unix-like systems

Default Config Vulnerable: ⚠️ Yes

Notes: Any application linking against vulnerable libtiff versions is affected when processing TIFF files.

📦 What is this software?

Libtiff by Libtiff

View all CVEs affecting Libtiff →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise if an attacker can upload or trigger processing of a malicious TIFF file.

🟠

Likely Case

Denial of service through application crashes when processing malicious TIFF files, potentially disrupting services that handle image uploads.

🟢

If Mitigated

Limited impact with proper input validation and sandboxing; crashes contained to isolated processes.

🌐 Internet-Facing: HIGH - Web applications accepting TIFF uploads are directly exposed to exploitation attempts.

🏢 Internal Only: MEDIUM - Internal users could exploit via malicious files, but requires user interaction or specific workflows.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Proof-of-concept exploit code is publicly available, making exploitation straightforward for attackers.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: libtiff 4.0.7 and later

Vendor Advisory: http://rhn.redhat.com/errata/RHSA-2016-1546.html

Restart Required: Yes

Instructions:

1. Update libtiff package using system package manager. 2. For Linux: 'sudo yum update libtiff' or 'sudo apt-get update && sudo apt-get upgrade libtiff'. 3. Recompile applications statically linked to libtiff. 4. Restart affected services.

🔧 Temporary Workarounds

Disable TIFF processing

all

Block or reject TIFF file uploads/processing in applications

Input validation

all

Implement strict file type validation and size limits for image uploads

🧯 If You Can't Patch

Implement network segmentation to isolate systems processing TIFF files
Deploy application sandboxing or containerization to limit exploit impact

🔍 How to Verify

Check if Vulnerable:

Check libtiff version: 'tiffinfo --version' or 'ldconfig -p | grep libtiff'

Check Version:

tiffinfo --version 2>&1 | head -1

Verify Fix Applied:

Verify libtiff version is 4.0.7 or higher: 'rpm -q libtiff' or 'dpkg -l libtiff*'

📡 Detection & Monitoring

Log Indicators:

Application crashes with segmentation faults
Memory corruption errors in system logs
Unusual TIFF file processing patterns

Network Indicators:

Unusual TIFF file uploads to web applications
TIFF files with abnormal sizes or structures

SIEM Query:

source=*app.log* (segfault OR "memory corruption" OR "invalid write") AND (tiff OR .tif)

📊 Metadata

CVE ID: CVE-2015-7554

CVSS v3 Score: 9.8 (CRITICAL)

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-254

Published: January 8, 2016

Last Updated: April 12, 2025

🔗 References

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