CVE-2020-15658

Mozilla: Overriding file type when saving to disk

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The code for downloading files did not properly take care of special characters, which led to an attacker being able to cut off the file ending at an earlier position, leading to a different file type being downloaded than shown in the dialog. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

El código para descargar archivos no toma cuidado apropiadamente de los caracteres especiales, lo que conllevaba a que un atacante sea capaz de cortar el archivo que terminaba en una posición anterior, conllevando a que sea descargado un tipo de archivo diferente al mostrado en el cuadro de diálogo. Esta vulnerabilidad afecta a Firefox ESR versiones anteriores a 78.1, Firefox versiones anteriores a 79 y Thunderbird versiones anteriores a 78.1

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-07-10 CVE Reserved
2020-08-10 CVE Published
2024-07-17 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-138: Improper Neutralization of Special Elements
CWE-754: Improper Check for Unusual or Exceptional Conditions

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html	2023-02-02
https://usn.ubuntu.com/4443-1	2023-02-02
https://www.mozilla.org/security/advisories/mfsa2020-30	2023-02-02
https://www.mozilla.org/security/advisories/mfsa2020-32	2023-02-02
https://www.mozilla.org/security/advisories/mfsa2020-33	2023-02-02
https://access.redhat.com/security/cve/CVE-2020-15658	2020-09-30
https://bugzilla.redhat.com/show_bug.cgi?id=1861647	2020-09-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"		Firefox Search vendor "Mozilla" for product "Firefox"				< 79.0 Search vendor "Mozilla" for product "Firefox" and version " < 79.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 78.1 Search vendor "Mozilla" for product "Firefox Esr" and version " < 78.1"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 78.1 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.1"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"		lts		Affected