CVE-2017-10671 Explained : Impact and Mitigation

A heap-based buffer overflow vulnerability in sthttpd version 2.27.1 and earlier can lead to a denial of service and potential system impacts when exploited by remote attackers.

Understanding CVE-2017-10671

The vulnerability in the de_dotdot function of libhttpd.c in sthttpd exposes systems to remote attacks, causing a daemon crash and other potential consequences.

What is CVE-2017-10671?

The de_dotdot function in libhttpd.c in sthttpd version 2.27.1 and earlier is susceptible to a heap-based buffer overflow. This security flaw allows remote attackers to trigger a denial of service, resulting in a daemon crash. It could also have other unspecified impacts on the system if a specially crafted filename is utilized.

The Impact of CVE-2017-10671

Exploitation of this vulnerability can lead to a denial of service condition, potentially causing a daemon crash. Moreover, the use of a maliciously crafted filename could result in additional, unspecified impacts on the affected system.

Technical Details of CVE-2017-10671

The technical aspects of the vulnerability provide insights into its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from a heap-based buffer overflow in the de_dotdot function of libhttpd.c in sthttpd before version 2.27.1. This flaw enables remote attackers to execute a denial of service attack or potentially induce other unspecified impacts by employing a specifically crafted filename.

Affected Systems and Versions

Affected Product: Not applicable
Affected Vendor: Not applicable
Affected Version: sthttpd version 2.27.1 and earlier

Exploitation Mechanism

The vulnerability can be exploited remotely by attackers to cause a denial of service, leading to a daemon crash. The use of a carefully crafted filename is the primary method for triggering this vulnerability.

Mitigation and Prevention

Protecting systems from CVE-2017-10671 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update sthttpd to version 2.27.1 or later to mitigate the vulnerability.
Implement network security measures to restrict access to vulnerable services.

Long-Term Security Practices

Regularly monitor and patch software for known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.

Patching and Updates

Apply patches and updates provided by the software vendor promptly to address security vulnerabilities and enhance system protection.