CVE-2022-35047 is a medium severity vulnerability identified as a heap buffer overflow in the OTFCC project, specifically within the otfccdump component at the memory address offset +0x6b05aa. OTFCC (OpenType Font C Compiler) is a tool used for compiling and dumping OpenType font files. The heap buffer overflow occurs when the program improperly handles memory allocation or copying operations, leading to potential overwriting of adjacent memory on the heap. This can cause program crashes or potentially allow an attacker to execute arbitrary code or cause denial of service. The vulnerability is exploitable remotely (AV:N), requires no privileges (PR:N), but does require user interaction (UI:R), such as opening or processing a malicious font file. The impact is limited to availability (A:H), with no direct confidentiality or integrity impact reported. No specific product versions are listed, and no patches or known exploits in the wild have been reported as of the publication date. The vulnerability is classified under CWE-787 (Out-of-bounds Write), indicating a classic memory corruption issue. Given the lack of detailed product or version information, the scope is somewhat unclear, but the vulnerability affects the otfccdump utility, which is used in font processing workflows and potentially integrated into other software that handles font files.

For European organizations, the primary impact of CVE-2022-35047 lies in the potential disruption of services that utilize OTFCC or related font processing tools. Organizations involved in software development, digital publishing, graphic design, or any domain that processes OpenType fonts could face denial of service conditions if maliciously crafted font files are processed. While the vulnerability does not directly compromise confidentiality or integrity, the availability impact could disrupt business operations, especially in environments where automated font processing is integral. Additionally, if exploited in a targeted manner, it could be used as a vector for further attacks, such as crashing font rendering services or triggering unexpected behavior in downstream applications. The requirement for user interaction means that exploitation would typically involve a user opening or processing a malicious font file, which could occur via email attachments, web downloads, or embedded fonts in documents. European organizations with less mature security awareness or insufficient file validation controls may be more vulnerable to such attack vectors.

To mitigate CVE-2022-35047, European organizations should first identify any use of OTFCC or otfccdump in their environments, including integration within larger software systems. Applying patches or updates from the OTFCC project as they become available is critical. In the absence of official patches, organizations should consider restricting or sandboxing the execution of otfccdump and related font processing tools to limit the impact of potential exploitation. Implement strict input validation and scanning of font files before processing, using antivirus and endpoint detection solutions capable of detecting malformed font files. User education is important to reduce the risk of opening untrusted font files, especially from email or web sources. Network-level controls such as blocking or monitoring downloads of suspicious font files can also reduce exposure. For developers, adopting safer memory handling practices and static analysis tools to detect buffer overflows in font processing code is recommended. Finally, maintaining comprehensive logging and monitoring for crashes or abnormal behavior in font processing utilities can aid in early detection of exploitation attempts.