CVE-2020-26970

Mozilla: Stack overflow due to incorrect parsing of SMTP server response codes

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable. This vulnerability affects Thunderbird < 78.5.1.

Cuando se leen los códigos de estado del servidor SMTP, Thunderbird escribe un valor entero hacia una posición en la pila que debe contener solo un byte. Dependiendo de la arquitectura del procesador y el diseño de la pila, esto conlleva a una corrupción de la pila que puede ser explotable. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 78.5.1

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-10-12 CVE Reserved
2020-12-07 CVE Published
2023-08-24 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-121: Stack-based Buffer Overflow
CWE-787: Out-of-bounds Write

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.mozilla.org/security/advisories/mfsa2020-53	2020-12-10
https://access.redhat.com/security/cve/CVE-2020-26970	2020-12-21
https://bugzilla.redhat.com/show_bug.cgi?id=1903443	2020-12-21

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"				< 78.5.1 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.5.1"		-		Affected