CVE-2017-7448 : Security Advisory and Response
Learn about CVE-2017-7448, a vulnerability in Dropbox Lepton 1.2.1 that allows remote attackers to trigger a divide-by-zero error and application crash using a malformed JPEG image. Find mitigation steps and prevention measures here.
A divide-by-zero error and application crash can be triggered by remote attackers using a malformed JPEG image through the allocate_channel_framebuffer function found in uncompressed_components.hh within Dropbox Lepton 1.2.1.
Understanding CVE-2017-7448
This CVE entry describes a vulnerability in Dropbox Lepton 1.2.1 that allows remote attackers to cause a denial of service by exploiting a divide-by-zero error and triggering an application crash.
What is CVE-2017-7448?
The allocate_channel_framebuffer function in uncompressed_components.hh in Dropbox Lepton 1.2.1 enables remote attackers to disrupt the service by exploiting a divide-by-zero error and causing an application crash using a malformed JPEG image.
The Impact of CVE-2017-7448
The vulnerability can be exploited remotely, potentially leading to a denial of service (DoS) condition on systems running the affected version of Dropbox Lepton.
Technical Details of CVE-2017-7448
This section provides more in-depth technical details about the vulnerability.
Vulnerability Description
The allocate_channel_framebuffer function in uncompressed_components.hh within Dropbox Lepton 1.2.1 allows remote attackers to trigger a divide-by-zero error and application crash by using a malformed JPEG image.
Affected Systems and Versions
- Product: Dropbox Lepton 1.2.1
- Vendor: Dropbox
- Version: 1.2.1
Exploitation Mechanism
The vulnerability can be exploited by remote attackers using a specially crafted JPEG image to trigger the divide-by-zero error and crash the application.
Mitigation and Prevention
To address CVE-2017-7448, follow these mitigation strategies:
Immediate Steps to Take
- Update Dropbox Lepton to a non-vulnerable version.
- Avoid opening JPEG images from untrusted sources.
Long-Term Security Practices
- Regularly update software and applications to patch known vulnerabilities.
- Implement network security measures to prevent remote exploitation.
Patching and Updates
Ensure that Dropbox Lepton is regularly updated to the latest version to mitigate the risk of exploitation.