Critical Remote Code Execution Vulnerability in FontForge Package
Summary
RLSA-2026:7677: Important: fontforge security update. Affects fontforge versions < 0:20200314-7.el8_10. Fixed in 0:20200314-7.el8_10. How to fix ↓
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Background
FontForge is a widely used open-source font editor that supports various font formats, including PostScript, TrueType, OpenType, and CID-keyed fonts. It allows users to create and edit both outline and bitmap fonts, making it a versatile tool for designers and developers. However, recent security assessments have revealed significant vulnerabilities within FontForge that could expose users to severe risks, including remote code execution.
Vulnerability Detail
The vulnerabilities in FontForge stem from improper handling of certain file formats, specifically BMP and SFD files. These issues include a heap-based buffer overflow during BMP file parsing, a use-after-free condition in SFD file parsing, and arbitrary code execution due to buffer overflows. Attackers can exploit these vulnerabilities by crafting malicious files that, when opened in FontForge, could lead to remote code execution, allowing them to execute arbitrary code on the user's system.
How To Fix
Minimum fixed version
0:20200314-7.el8_10
This is the first release that contains the fix.
sudo dnf update fontforgeTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users are advised to avoid opening untrusted BMP and SFD files in FontForge until the package is updated. Additionally, consider using alternative font editing tools that do not exhibit these vulnerabilities.
Conclusion
The vulnerabilities identified in FontForge pose significant risks to users, particularly through remote code execution. It is crucial for users to update to the latest patched version to protect their systems. By understanding the nature of these vulnerabilities and implementing the recommended fixes, users can safeguard their applications and data.
See every vulnerability recorded for fontforge →
FAQ
The CVSS score of the vulnerability is 8.8, indicating a high severity level.
Attackers can execute remote code, potentially gaining control over the affected system by exploiting the vulnerabilities in FontForge.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.
The vulnerabilities are associated with BMP and SFD file formats, which are used in FontForge.
While the primary risk is remote code execution, there is a potential for data loss if an attacker executes malicious code that alters or deletes files.
References
Related vulnerabilities
Recent vulnerabilities recorded for fontforge.
