CVE-2017-12781 Explained : Impact and Mitigation
Learn about CVE-2017-12781, a vulnerability in libebml2 allowing remote attackers to trigger an application crash and Null pointer dereference via a specially crafted mkv file. Find mitigation steps here.
CVE-2017-12781 was published on November 9, 2017, and is related to a vulnerability in libebml2 that can be exploited by remote attackers through a specially crafted mkv file. This vulnerability can lead to an application crash and a Null pointer dereference.
Understanding CVE-2017-12781
This CVE entry highlights a specific vulnerability in libebml2 that can be triggered by manipulating a mkv file.
What is CVE-2017-12781?
The vulnerability in the EBML_BufferToID function in ebmlelement.c of libebml2 allows remote attackers to cause a denial of service by exploiting a crafted mkv file.
The Impact of CVE-2017-12781
The exploitation of this vulnerability can result in an application crash and a Null pointer dereference, potentially leading to service disruption or system instability.
Technical Details of CVE-2017-12781
This section delves into the technical aspects of the CVE, including the vulnerability description, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability in libebml2 up to and including the version dated 2012-08-26 allows remote attackers to trigger an application crash and a Null pointer dereference by exploiting the EBML_BufferToID function in ebmlelement.c.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Up to and including the version dated 2012-08-26
Exploitation Mechanism
Remote attackers can exploit this vulnerability by using a specially crafted mkv file to trigger the EBML_BufferToID function in ebmlelement.c, leading to a denial of service.
Mitigation and Prevention
To address CVE-2017-12781, it is crucial to implement immediate steps and adopt long-term security practices to enhance system resilience.
Immediate Steps to Take
- Apply security patches or updates provided by the vendor promptly.
- Consider implementing network-level protections to filter out potentially malicious mkv files.
Long-Term Security Practices
- Conduct regular security assessments and audits to identify and mitigate vulnerabilities proactively.
- Educate users and administrators about safe file handling practices to prevent exploitation of similar vulnerabilities.
Patching and Updates
Regularly check for security advisories from the vendor and apply patches or updates as soon as they are available.