CVE-2018-10887 : Vulnerability Insights and Analysis

A vulnerability in libgit2 before version 0.27.3 allows an attacker to trigger an integer overflow, leading to an out-of-bounds read and potential memory disclosure or Denial of Service.

Understanding CVE-2018-10887

This CVE involves a flaw in libgit2 that could be exploited by malicious actors to read memory addresses or cause a Denial of Service attack.

What is CVE-2018-10887?

The vulnerability lies in the git_delta_apply function in the delta.c file of libgit2.
It stems from an unexpected sign extension that can result in an integer overflow.
This overflow can lead to an out-of-bounds read, enabling attackers to access information before the base object.
Exploiting this flaw could allow attackers to leak memory addresses or trigger a Denial of Service.

The Impact of CVE-2018-10887

Attackers could potentially exploit this vulnerability to read sensitive information or disrupt services, leading to a loss of confidentiality and availability.

Technical Details of CVE-2018-10887

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw in libgit2 before version 0.27.3 allows for an integer overflow due to an unexpected sign extension in the git_delta_apply function.

Affected Systems and Versions

Product: libgit2
Vendor: libgit2
Versions Affected: Before version 0.27.3

Exploitation Mechanism

Attackers can exploit the integer overflow to trigger an out-of-bounds read, potentially leading to memory disclosure or a Denial of Service attack.

Mitigation and Prevention

Protecting systems from CVE-2018-10887 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update libgit2 to version 0.27.3 or later to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation of the flaw.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Implement strong access controls and monitoring mechanisms to detect and prevent unauthorized access.

Patching and Updates

Stay informed about security updates and patches released by libgit2 to address vulnerabilities like CVE-2018-10887.