CVE-2023-6865

Mozilla: Potential exposure of uninitialized data in <code>EncryptingOutputStream</code>

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

`EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be abused in order to write data to a local disk which may have implications for private browsing mode. This vulnerability affects Firefox ESR < 115.6 and Firefox < 121.

`EncryptingOutputStream` era susceptible de exponer datos no inicializados. Sólo se puede abusar de este problema para escribir datos en un disco local, lo que puede tener implicaciones para el modo de navegación privada. Esta vulnerabilidad afecta a Firefox ESR <115.6 y Firefox <121.

The Mozilla Foundation Security Advisory describes this flaw as:

`EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be abused in order to write data to a local disk which may have implications for private browsing mode.

*Credits: Jan Varga

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-12-15 CVE Reserved
2023-12-19 CVE Published
2024-01-10 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-908: Use of Uninitialized Resource

CAPEC

References (7)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html	Mailing List
https://security.gentoo.org/glsa/202401-10	Third Party Advisory
https://www.debian.org/security/2023/dsa-5581	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.mozilla.org/security/advisories/mfsa2023-54	2024-02-02
https://www.mozilla.org/security/advisories/mfsa2023-56	2024-02-02
https://access.redhat.com/security/cve/CVE-2023-6865	2024-01-02
https://bugzilla.redhat.com/show_bug.cgi?id=2255361	2024-01-02

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"				< 121.0 Search vendor "Mozilla" for product "Firefox" and version " < 121.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 115.6 Search vendor "Mozilla" for product "Firefox Esr" and version " < 115.6"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				12.0 Search vendor "Debian" for product "Debian Linux" and version "12.0"		-		Affected