CVE-2017-6439 : Exploit Details and Defense Strategies
Learn about CVE-2017-6439, a denial of service vulnerability in libplist 1.12 allowing local attackers to exploit a heap-based buffer overflow. Find mitigation steps and update recommendations here.
A local attacker can cause a denial of service (out-of-bounds write) on the libplist version 1.12 by exploiting a heap-based buffer overflow vulnerability in the parse_string_node function in bplist.c file of the libimobiledevice library when processing a manipulated plist file.
Understanding CVE-2017-6439
What is CVE-2017-6439?
CVE-2017-6439 is a vulnerability in the libimobiledevice libplist 1.12 that allows a local attacker to trigger a denial of service attack through a crafted plist file.
The Impact of CVE-2017-6439
This vulnerability enables a local attacker to execute a denial of service attack by exploiting a heap-based buffer overflow in the libimobiledevice library.
Technical Details of CVE-2017-6439
Vulnerability Description
The vulnerability lies in the parse_string_node function in bplist.c within the libimobiledevice libplist 1.12, allowing local users to perform a denial of service attack through an out-of-bounds write.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Version: 1.12
Exploitation Mechanism
The vulnerability can be exploited by a local attacker manipulating a plist file to trigger the heap-based buffer overflow, leading to a denial of service.
Mitigation and Prevention
Immediate Steps to Take
- Apply the security update provided by libplist to address the vulnerability.
- Avoid opening untrusted or manipulated plist files to mitigate the risk of exploitation.
Long-Term Security Practices
- Regularly update software and libraries to patch known vulnerabilities.
- Implement proper input validation mechanisms to prevent buffer overflow attacks.
Patching and Updates
Ensure that the libplist library is updated to the latest version to eliminate the vulnerability.