CVE-2020-28638 : Security Advisory and Response

Tomb 2.0 through 2.7 is affected by a vulnerability where ask_password returns a warning when pinentry-curses is used and $DISPLAY is non-empty, leading to files being encrypted with a specific key.

Understanding CVE-2020-28638

This CVE involves a security issue in Tomb versions 2.0 through 2.7.

What is CVE-2020-28638?

The vulnerability in ask_password in Tomb versions 2.0 through 2.7 triggers a warning when pinentry-curses is utilized with a non-empty $DISPLAY, resulting in files being encrypted with a specific key.

The Impact of CVE-2020-28638

The vulnerability can lead to files being encrypted with an unintended key, potentially compromising the confidentiality of the encrypted data.

Technical Details of CVE-2020-28638

This section provides more technical insights into the CVE.

Vulnerability Description

The ask_password function in Tomb 2.0 through 2.7 generates a warning when pinentry-curses is used with a non-empty $DISPLAY, causing files to be encrypted with an unintended key.

Affected Systems and Versions

Tomb versions 2.0 through 2.7 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability is exploited when pinentry-curses is employed with a non-empty $DISPLAY, triggering the encryption of files with an unintended key.

Mitigation and Prevention

Protecting systems from the CVE and preventing exploitation is crucial.

Immediate Steps to Take

Users should avoid using pinentry-curses with a non-empty $DISPLAY to mitigate the vulnerability.
Consider updating Tomb to a patched version that addresses this issue.

Long-Term Security Practices

Regularly update software and apply security patches to prevent vulnerabilities.
Implement secure encryption practices to safeguard sensitive data.

Patching and Updates

Stay informed about security updates for Tomb and promptly apply patches to address known vulnerabilities.