PT-2020-17022 · Dyne · Tomb

Aaronjanse · Published 2020-11-13 · Updated 2020-12-02 · CVE-2020-28638

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Tomb versions 2.0 through 2.7

Description The issue arises when ask password in Tomb is used with pinentry-curses and the $DISPLAY variable is non-empty. This causes affected users' files to be encrypted with a specific warning message as the encryption key, potentially leading to security issues.

Recommendations For Tomb versions 2.0 through 2.7, consider disabling the use of pinentry-curses when $DISPLAY is non-empty to prevent the misuse of the warning message as an encryption key. Restrict the ask password function to avoid encryption with the warning message until a proper fix is applied.

Exploit

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2020-28638

Affected Products

Tomb

References · 10

• 🔥 https://github.com/dyne/Tomb/issues/385 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-28638 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-28638 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-28638 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-28638 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-28638 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-28638 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-28638 · Vendor Advisory
• https://github.com/dyne/Tomb/pull/386 · Note
• https://t.me/cibsecurity/16328 · Telegram Post