CVE-2017-5855 : What You Need to Know
Learn about CVE-2017-5855, a vulnerability in PoDoFo version 0.9.4 allowing remote attackers to trigger a denial of service via a crafted file. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A crafted file can cause a denial of service (NULL pointer dereference) by exploiting the PoDoFo::PdfParser::ReadXRefSubsection function in PdfParser.cpp of PoDoFo version 0.9.4. Remote attackers can exploit this vulnerability.
Understanding CVE-2017-5855
This CVE entry describes a vulnerability in PoDoFo version 0.9.4 that allows remote attackers to trigger a denial of service by exploiting a specific function.
What is CVE-2017-5855?
The vulnerability in PoDoFo version 0.9.4 enables attackers to execute a denial of service attack through a crafted file, exploiting a particular function in the software.
The Impact of CVE-2017-5855
This vulnerability can be exploited remotely by attackers to cause a denial of service, leading to potential system unavailability and disruption of services.
Technical Details of CVE-2017-5855
This section provides more technical insights into the CVE-2017-5855 vulnerability.
Vulnerability Description
The PoDoFo::PdfParser::ReadXRefSubsection function in PdfParser.cpp of PoDoFo 0.9.4 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file.
Affected Systems and Versions
- Affected Product: PoDoFo
- Affected Version: 0.9.4
Exploitation Mechanism
- Attackers exploit the PoDoFo::PdfParser::ReadXRefSubsection function in PdfParser.cpp by using a crafted file to trigger a NULL pointer dereference, resulting in a denial of service.
Mitigation and Prevention
Protecting systems from CVE-2017-5855 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update PoDoFo to a patched version that addresses the vulnerability.
- Implement network security measures to prevent remote exploitation.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Conduct security assessments and audits to identify and mitigate vulnerabilities.
Patching and Updates
- Stay informed about security advisories related to PoDoFo and promptly apply patches released by the vendor.