CVE-2019-7306 Explained : Impact and Mitigation
Learn about CVE-2019-7306, a vulnerability in Byobu's Apport hook that may expose sensitive information by uploading the user's .screenrc file. Find mitigation steps and affected versions here.
Byobu apport hook uploads user's ~/.screenrc file, potentially exposing sensitive information.
Understanding CVE-2019-7306
An issue in the Byobu Apport hook could lead to the inadvertent disclosure of confidential data.
What is CVE-2019-7306?
The vulnerability in Byobu's Apport hook allows for the automatic upload of a user's .screenrc file, which may contain private details like hostnames, usernames, and passwords.
The Impact of CVE-2019-7306
- CVSS Base Score: 4.3 (Medium)
- Attack Vector: Network
- Confidentiality Impact: Low
- User Interaction: Required
- The scope of this issue is limited to the Byobu application.
Technical Details of CVE-2019-7306
The technical aspects of the vulnerability in Byobu's Apport hook.
Vulnerability Description
The Byobu Apport hook can inadvertently expose sensitive information by uploading the user's .screenrc file.
Affected Systems and Versions
- Affected Product: Byobu
- Vendor: Canonical
- Affected Version: < 5.128-0ubuntu1 (unspecified)
Exploitation Mechanism
The vulnerability occurs when the Apport hook automatically uploads the local user's .screenrc file, potentially revealing confidential data.
Mitigation and Prevention
Steps to mitigate and prevent the CVE-2019-7306 vulnerability.
Immediate Steps to Take
- Disable the Byobu Apport hook to prevent automatic uploading of .screenrc.
- Regularly monitor for unauthorized access or use of sensitive information.
Long-Term Security Practices
- Implement encryption for sensitive files to protect data at rest.
- Educate users on the importance of secure file handling practices.
Patching and Updates
- Apply patches provided by Canonical to address the vulnerability in Byobu's Apport hook.