Denial of Service Vulnerability in elfutils: Heap-based Buffer Over-read
Summary
ALPINE-CVE-2017-7607: The handle_gnu_hash function in readelf.c in elfutils 0.168 allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via a crafted ELF file. Affects elfutils versions < 0.168-r1. Fixed in 0.168-r1. How to fix ↓
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Background
elfutils is a collection of utilities for handling ELF (Executable and Linkable Format) files, primarily used in Unix-like operating systems. It provides tools for examining and manipulating ELF files, which are crucial for executable binaries and shared libraries. The package is widely utilized in various applications, making its security paramount. The vulnerability in question affects multiple versions of elfutils across various Alpine Linux releases.
Vulnerability Detail
The vulnerability identified as CVE-2017-7607 arises from the handle_gnu_hash function in readelf.c within elfutils version 0.168. This flaw allows remote attackers to exploit crafted ELF files, leading to a denial of service through heap-based buffer over-reads, ultimately causing the application to crash. The vulnerability's CVSS score is 5.5, indicating a moderate severity level that could impact system stability and availability.
How To Fix
Minimum fixed version
0.168-r1
This is the first release that contains the fix.
sudo apk add --upgrade elfutilsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, avoid processing untrusted ELF files until the package is updated. This can help mitigate the risk of exploitation while waiting for a patch.
Conclusion
The CVE-2017-7607 vulnerability in elfutils poses a significant risk of denial of service through crafted ELF files. It is crucial for users of affected versions to update to the patched version 0.168-r1 to ensure system stability and security. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
See every vulnerability recorded for elfutils →
FAQ
CVE-2017-7607 is a vulnerability in elfutils that allows remote attackers to cause a denial of service through crafted ELF files.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The vulnerability has a CVSS score of 5.5, indicating a moderate risk level that could lead to application crashes.
If immediate updates are not possible, refrain from using untrusted ELF files to minimize the risk of exploitation.
For more information on open-source vulnerabilities, you can visit Vulert at https://vulert.com, which monitors and alerts for vulnerabilities in real-time.
References
Related vulnerabilities
Recent vulnerabilities recorded for elfutils.
