CVE-2023-4581

Mozilla: XLL file extensions were downloadable without warnings

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

Excel `.xll` add-in files did not have a blocklist entry in Firefox's executable blocklist which allowed them to be downloaded without any warning of their potential harm. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2.

Los archivos complementarios `.xll` de Excel no tenían una entrada en la lista de bloqueo ejecutable de Firefox, lo que permitía descargarlos sin ninguna advertencia sobre su daño potencial. Esta vulnerabilidad afecta a Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2 y Thunderbird < 115.2.

The Mozilla Foundation Security Advisory describes this flaw as:

Excel `.xll` add-in files did not have a blocklist entry in Firefox's executable blocklist which allowed them to be downloaded without any warning of their potential harm.

*Credits: Umar Farooq (@Puf)

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-08-29 CVE Reserved
2023-08-31 CVE Published
2024-09-26 CVE Updated
2024-10-13 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-1127: Compilation with Insufficient Warnings or Errors

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.mozilla.org/security/advisories/mfsa2023-34	2023-09-14
https://www.mozilla.org/security/advisories/mfsa2023-35	2023-09-14
https://www.mozilla.org/security/advisories/mfsa2023-36	2023-09-14
https://www.mozilla.org/security/advisories/mfsa2023-37	2023-09-14
https://www.mozilla.org/security/advisories/mfsa2023-38	2023-09-14
https://access.redhat.com/security/cve/CVE-2023-4581	2023-09-07
https://bugzilla.redhat.com/show_bug.cgi?id=2236080	2023-09-07

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"				< 117.0 Search vendor "Mozilla" for product "Firefox" and version " < 117.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 102.15 Search vendor "Mozilla" for product "Firefox Esr" and version " < 102.15"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				>= 115.0 < 115.2 Search vendor "Mozilla" for product "Firefox Esr" and version " >= 115.0 < 115.2"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 115.2 Search vendor "Mozilla" for product "Thunderbird" and version " < 115.2"		-		Affected