CVE-2018-11726 Explained : Impact and Mitigation

A crafted mobi file can potentially cause a denial of service (heap-based buffer overflow) or have other unspecified impact in Libmobi 0.3 through the mobi_decode_font_resource function in util.c.

Understanding CVE-2018-11726

The vulnerability in Libmobi 0.3 can lead to denial of service attacks and other potential impacts when processing a specially crafted mobi file.

What is CVE-2018-11726?

The mobi_decode_font_resource function in util.c in Libmobi 0.3 allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted mobi file.

The Impact of CVE-2018-11726

This vulnerability can be exploited by attackers to trigger denial of service conditions or potentially execute arbitrary code on the affected system.

Technical Details of CVE-2018-11726

The technical details of the CVE-2018-11726 vulnerability in Libmobi 0.3 are as follows:

Vulnerability Description

The mobi_decode_font_resource function in util.c in Libmobi 0.3 is susceptible to a heap-based buffer overflow when processing malicious mobi files.

Affected Systems and Versions

Affected Version: Libmobi 0.3

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious mobi file to trigger the heap-based buffer overflow, leading to a denial of service or other potential impacts.

Mitigation and Prevention

To mitigate the risks associated with CVE-2018-11726, consider the following steps:

Immediate Steps to Take

Disable the processing of untrusted mobi files.
Implement file type validation mechanisms to detect and block malicious mobi files.

Long-Term Security Practices

Regularly update Libmobi to the latest version to patch known vulnerabilities.
Conduct security assessments and audits to identify and address potential vulnerabilities in the system.

Patching and Updates

Apply patches provided by the vendor promptly to address the vulnerability and enhance system security.