CVE-2019-13118 : Security Advisory and Response
Learn about CVE-2019-13118, a vulnerability in libxslt 1.1.33 that could lead to reading uninitialized data from the stack. Find out the impact, technical details, affected systems, exploitation mechanism, and mitigation steps.
This CVE-2019-13118 article provides insights into a vulnerability in libxslt 1.1.33 that could lead to reading uninitialized data from the stack.
Understanding CVE-2019-13118
This CVE-2019-13118 vulnerability in libxslt 1.1.33 could allow for the reading of uninitialized data from the stack due to a type restriction issue.
What is CVE-2019-13118?
In libxslt 1.1.33, a specific type used to store grouping characters of an xsl:number instruction was too restrictive. This flaw could permit the provision of an invalid combination of characters and length to xsltNumberFormatDecimal, potentially leading to the reading of uninitialized data from the stack.
The Impact of CVE-2019-13118
The vulnerability could be exploited to read uninitialized data from the stack, potentially leading to information disclosure or further exploitation of the affected system.
Technical Details of CVE-2019-13118
This section delves into the technical aspects of the CVE-2019-13118 vulnerability.
Vulnerability Description
The issue in numbers.c in libxslt 1.1.33 allowed for an overly restrictive type for storing grouping characters of an xsl:number instruction, enabling the reading of uninitialized data from the stack.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Version: 1.1.33
Exploitation Mechanism
The vulnerability could be exploited by providing an invalid combination of characters and length to xsltNumberFormatDecimal, triggering the reading of uninitialized data from the stack.
Mitigation and Prevention
Here are the steps to mitigate and prevent the CVE-2019-13118 vulnerability.
Immediate Steps to Take
- Apply security patches provided by the vendor promptly.
- Monitor vendor communications for updates and advisories.
- Implement the principle of least privilege to restrict access.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Conduct security assessments and audits to identify vulnerabilities.
- Educate users and administrators about secure coding practices.
Patching and Updates
Ensure that the affected systems are updated with the latest patches and security fixes to address the CVE-2019-13118 vulnerability.