CVE-2019-19977 : Vulnerability Insights and Analysis
Discover the impact of CVE-2019-19977, a vulnerability in libESMTP through version 1.0.6 that allows a stack-based buffer over-read, potentially exposing sensitive data. Learn how to mitigate and prevent this security risk.
libESMTP through version 1.0.6 mishandles domain copying into a fixed-size buffer in ntlm_build_type_2 function, leading to a stack-based buffer over-read.
Understanding CVE-2019-19977
This CVE involves a vulnerability in libESMTP that can result in a stack-based buffer over-read due to mishandling of domain copying.
What is CVE-2019-19977?
The vulnerability arises from improper handling of domain copying into a fixed-size buffer within the ntlm_build_type_2 function in libESMTP.
The Impact of CVE-2019-19977
The stack-based buffer over-read caused by this vulnerability can potentially be exploited by attackers to read sensitive information from the affected system's memory.
Technical Details of CVE-2019-19977
This section delves into the specifics of the vulnerability.
Vulnerability Description
The issue occurs in the ntlm_build_type_2 function in ntlm/ntlmstruct.c of libESMTP through version 1.0.6, where domain copying is not properly handled, leading to a stack-based buffer over-read.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: All versions up to and including 1.0.6
Exploitation Mechanism
Attackers can exploit this vulnerability to trigger a stack-based buffer over-read, potentially exposing sensitive data.
Mitigation and Prevention
Protecting systems from CVE-2019-19977 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply patches or updates provided by the vendor to address the vulnerability.
- Monitor security advisories for any new information or patches related to this CVE.
Long-Term Security Practices
- Regularly update software and libraries to ensure the latest security fixes are in place.
- Conduct security assessments and penetration testing to identify and remediate vulnerabilities proactively.
Patching and Updates
Ensure that the affected software, in this case, libESMTP, is updated to a version that includes a fix for the buffer over-read vulnerability.