CVE-2019-11755

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A crafted S/MIME message consisting of an inner encryption layer and an outer SignedData layer was shown as having a valid digital signature, although the signer might have had no access to the contents of the encrypted message, and might have stripped a different signature from the encrypted message. Previous versions had only suppressed showing a digital signature for messages with an outer multipart/signed layer. This vulnerability affects Thunderbird < 68.1.1.

Un mensaje S/MIME diseñado que consta de una capa de cifrado interna y una capa SignedData externa se mostró con firma digital válida, aunque el firmante podría no haber tenido acceso al contenido del mensaje cifrado y podría haber eliminado una firma diferente del mensaje cifrado. Las versiones anteriores solo habían suprimido el despliegue de una firma digital para mensajes con una capa externa multiparte y firmada. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 68.1.1.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-05-03 CVE Reserved
2019-09-27 CVE Published
2024-08-04 CVE Updated
2024-09-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (8)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2019/11/msg00017.html	Mailing List
https://seclists.org/bugtraq/2019/Nov/24	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html	2020-08-24
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html	2020-08-24
https://usn.ubuntu.com/4202-1	2020-08-24
https://usn.ubuntu.com/4335-1	2020-08-24
https://www.debian.org/security/2019/dsa-4571	2020-08-24
https://www.mozilla.org/security/advisories/mfsa2019-32	2020-08-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 68.1.1 Search vendor "Mozilla" for product "Thunderbird" and version " < 68.1.1"		-		Affected