CVE-2025-27363 Summary
CVE-2025-27363 is a recently published vulnerability affecting FreeType, specifically in versions 2.13.0 and earlier. The issue arises during the parsing of font subglyph structures associated with TrueType GX and variable font files. The vulnerability is categorized as a "write out of bounds" error, which could potentially lead to arbitrary code execution.
Technical Details
In detail, the vulnerability occurs when the code attempts to handle font files improperly. It involves assigning a signed short value to an unsigned long variable, which, when combined with a static value, causes wraparound effects. This wraparound can lead to the allocation of an insufficiently sized heap buffer. Once the buffer is allocated, the code proceeds to write up to six signed long integers beyond the boundaries of this buffer. This action can potentially compromise the system’s integrity, allowing an attacker to execute arbitrary code.
The risk associated with this vulnerability is significant, as it may already have been exploited in the wild, which intensifies the need for immediate action.
CVSS Metrics
The Common Vulnerability Scoring System (CVSS) scores the vulnerability using several versions:
- CVSS v4.0: No specific vector strings were provided, but the vulnerability’s impact is elevated given the context.
- CVSS v3.x: The severity is noted without explicit details.
- CVSS v2.0: Similar lack of detailed grading, but suggests a critical level of concern.
The CVSS scores are an essential part of understanding the implications of this vulnerability, allowing organizations to assess the risk to their systems effectively.
Weakness Enumeration
This vulnerability has also been classified under the weakness type CWE-787, which pertains to an "out of bounds write." This classification aids in identifying and understanding similar vulnerabilities in various software contexts. The National Cybersecurity and Infrastructure Security Agency (CISA) has tagged this vulnerability, signaling its significance in the cybersecurity landscape.
Changes and Updates
The record for CVE-2025-27363 has seen modifications. The first recorded update was made by CISA on March 11, 2025, where CWE-787 was added to further categorize the vulnerability. Additionally, a new description was included to clarify the vulnerabilities and their implications better. This emphasis on detailed tracking helps maintain transparency and offers a clearer understanding for those reviewing vulnerabilities within the NVD (National Vulnerability Database).
Facebook, Inc. is noted as the source of this CVE entry, reflecting their proactive stance in informing the public about software vulnerabilities that impact their security.
References and Recommendations
The listing provides external links for additional resources, warning users that these links navigate away from the NIST website. These resources are valuable for anyone needing deeper insights or solutions related to the vulnerability. However, it is essential to exercise caution, as linking to other websites does not imply endorsement by NIST.
Organizations affected by CVE-2025-27363 are urged to review their FreeType implementations and prioritize applying patches that address this vulnerability. Software developers should also validate their buffer handling practices to prevent similar issues from arising in their code.
In conclusion, CVE-2025-27363 represents a significant security concern within FreeType software. The technical specifics underscore the importance of vigilant software practices, while the changing dynamics of the report illustrate the need for ongoing scrutiny in cybersecurity. Organizations are encouraged to remain aware of such vulnerabilities and engage in proactive risk management to safeguard their systems against potential exploits.