CVE-2017-17080 : What You Need to Know

The elf.c file in the BFD library, distributed as part of GNU Binutils versions 2.29.1, lacks proper validation of core note sizes, allowing remote attackers to exploit this vulnerability.

Understanding CVE-2017-17080

This CVE involves a vulnerability in the BFD library that can lead to a denial of service due to a heap-based buffer over-read and application crash.

What is CVE-2017-17080?

The elf.c file in the BFD library does not validate core note sizes properly.
Attackers can exploit this remotely by creating a malicious object file.
Affected functions include elfcore_grok_netbsd_procinfo, elfcore_grok_openbsd_procinfo, and elfcore_grok_nto_status.

The Impact of CVE-2017-17080

Remote attackers can cause a denial of service by exploiting this vulnerability.
It can result in a heap-based buffer over-read and application crash.

Technical Details of CVE-2017-17080

This section provides more technical insights into the vulnerability.

Vulnerability Description

The elf.c file in the BFD library lacks proper validation of core note sizes.
This allows attackers to create a malicious object file, leading to a denial of service.

Affected Systems and Versions

GNU Binutils versions 2.29.1 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability remotely by crafting a malicious object file.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2017-17080.

Immediate Steps to Take

Update Binutils to a non-vulnerable version.
Implement proper input validation mechanisms.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Conduct security audits and code reviews to identify vulnerabilities.

Patching and Updates

Apply patches provided by the software vendor to fix the vulnerability.