Vulnerability · Published Jan 25, 2024 · Assigned by GitHub_M

CVE-2024-23655Attacker can prevent users from accessing received emails

High 7.5

In plain English

A high-severity improper input validation in tutanota from tutao. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.8%top 43.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Tuta is an encrypted email service. Starting in version 3.118.12 and prior to version 3.119.10, an attacker is able to send a manipulated email so that the user can no longer use the app to get access to received emails. By sending a manipulated email, an attacker could put the app into an unusable state. In this case, a user can no longer access received e-mails. Since the vulnerability affects not only the app, but also the web application, a user in this case has no way to access received emails. This issue was tested with iOS and the web app, but it is possible all clients are affected. Version 3.119.10 fixes this issue.

Affected products (as reported)

Vendor	Product	Versions
tutao	tutanota	>= 3.118.12, < 3.119.10

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/tutao/tutanota/security/advisories/GHSA-5h47-g927-629g x_refsource_CONFIRM
https://github.com/tutao/tutanota/releases/tag/tutanota-release-3.119.10 x_refsource_MISC