LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, there is a heap buffer overflow vulnerability in the libpng simplified API function png_image_finish_read when processing 16-bit interlaced PNGs with 8-bit output format. Attacker-crafted interlaced PNG files cause heap writes beyond allocated buffer bounds. This issue has been patched in version 1.6.51.
The CVSS score of 7.1 categorizes this vulnerability as high severity, indicating a significant risk to organizations utilizing affected versions of libpng. The potential for exploitation is heightened due to the nature of the vulnerability and the ease with which it can be triggered by malicious PNG files.
Risk to organizations includes unauthorized access and potential data corruption, as the heap buffer overflow can lead to integrity and availability issues.
Organizations should prioritize patching immediately to mitigate the risk associated with this vulnerability.
Vulnerability Details
The vulnerability in libpng is classified as a heap buffer overflow and is identified by CWE-122 and CWE-787. The affected versions range from 1.6.0 to before 1.6.51. The CVSS vector indicates a local attack vector with low complexity and no privileges required, but user interaction is needed.
Technical Analysis
The root cause of the vulnerability lies in the way libpng processes interlaced PNG files. The vulnerability occurs when processing 16-bit interlaced PNGs with an 8-bit output format, leading to heap writes beyond allocated buffer bounds.
The attack vector is local, meaning an attacker would need access to the vulnerable system. The attack complexity is low, as it requires no privileges and does necessitate user interaction. If successfully exploited, this vulnerability can lead to high integrity and availability impacts.
Risk & Impact Analysis
The real-world deployment risk of this vulnerability is significant, especially for organizations that rely on libpng for image processing. Attackers may leverage this vulnerability to manipulate applications, potentially leading to data corruption or system crashes.
Given the CVSS score and the nature of the vulnerability, organizations should assess the urgency of remediation based on their exposure to affected versions and the potential blast radius of an attack.
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of libpng from 1.6.0 to before 1.6.51 are affected by this vulnerability. Organizations should upgrade to version 1.6.51 or later to mitigate this risk.
Mitigation & Remediation
To remediate this vulnerability, organizations should patch to version 1.6.51 or later. If immediate patching is not possible, consider implementing workarounds such as disabling the processing of 16-bit interlaced PNGs or applying strict input validation on PNG files.
For ongoing protection, organizations may consider utilizing penetration testing services to identify similar vulnerabilities and improve security posture.
Detection Guidance
Organizations should monitor logs for unusual behavior associated with image processing and implement network signatures that can detect attempts to exploit this vulnerability. Behavioral anomalies, such as unexpected application crashes or memory corruption errors, should also be investigated.
AppSecure Threat Intelligence Insight
The emergence of this vulnerability highlights the ongoing challenges in software security, particularly in libraries that handle complex data formats like images. It serves as a reminder for security teams to prioritize vulnerability management and patching processes.
Security teams should also consider enhancing their security posture through comprehensive solutions such as application security assessments and red teaming services to simulate real-world attacks and uncover potential weaknesses.
In conclusion, organizations must remain vigilant and proactive in addressing vulnerabilities such as CVE-2025-65018 to safeguard their applications and data.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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