CVE-2020-27748

Publication date 24 November 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
xdg-utils	20.10 groovy	Ignored
	20.04 LTS focal	Ignored
	18.04 LTS bionic	Ignored
	16.04 LTS xenial	Ignored
	14.04 LTS trusty	Not in release

Notes

leosilva

the patch was made in a stable release removing the functionality of --attach in thuderbird and other applications we decided to mark it as ignored since it causes regression cross applications. Also, considers it not as medium since the attach ability requires users permissions.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
xdg-utils	Other: 1f19981

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N