CVE-2019-20387 : Vulnerability Insights and Analysis
Learn about CVE-2019-20387, a heap-based buffer over-read vulnerability in the libsolv library before version 0.7.6, allowing data exposure beyond allocated buffers. Find out how to mitigate and prevent this security risk.
A heap-based buffer over-read vulnerability in the libsolv library before version 0.7.6 can lead to data exposure beyond allocated buffers.
Understanding CVE-2019-20387
The vulnerability in the repodata_schema2id function in the libsolv library poses a security risk due to a heap-based buffer over-read.
What is CVE-2019-20387?
The function repodata_schema2id in the file repodata.c in the libsolv library before version 0.7.6 is affected by a heap-based buffer over-read vulnerability. This occurs when the length of the last schema is shorter than the length of the input schema, leading to data being read beyond the allocated buffer.
The Impact of CVE-2019-20387
The vulnerability allows attackers to read data beyond the allocated buffer, potentially exposing sensitive information and compromising system integrity.
Technical Details of CVE-2019-20387
The technical aspects of the vulnerability provide insights into its nature and potential risks.
Vulnerability Description
The vulnerability in repodata_schema2id in repodata.c in libsolv before version 0.7.6 results in a heap-based buffer over-read due to a shorter last schema length compared to the input schema.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Versions Affected: N/A
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting a specific input schema with a shorter length, triggering the buffer over-read and potentially accessing sensitive data.
Mitigation and Prevention
Protecting systems from CVE-2019-20387 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update to libsolv version 0.7.6 or later to mitigate the vulnerability.
- Monitor for any unusual activities that might indicate exploitation of the buffer over-read.
Long-Term Security Practices
- Regularly update software and libraries to patch known vulnerabilities.
- Implement secure coding practices to prevent buffer over-read vulnerabilities.
Patching and Updates
- Apply the security update provided by libsolv to address the heap-based buffer over-read vulnerability.