CVE-2019-11759

Mozilla: Stack buffer overflow in HKDF output

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An attacker could have caused 4 bytes of HMAC output to be written past the end of a buffer stored on the stack. This could be used by an attacker to execute arbitrary code or more likely lead to a crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

Un atacante podría haber causado que 4 bytes de salida HMAC se escribieran más allá del final de un búfer almacenado en la pila. Esto podría ser usado por un atacante para ejecutar código arbitrario o, más probablemente, conllevar a un bloqueo. Esta vulnerabilidad afecta a Firefox versiones anteriores a la versión 70, Thunderbird versiones anteriores la versión 68.2 y Firefox ESR versiones anteriores a la versión 68.2.

A flaw was discovered in both Firefox and Thunderbird where 4 bytes of a HMAC output could be written past the end of a buffer stored on the memory stack. This could allow an attacker to execute arbitrary code or lead to a crash. This flaw can be exploited over the network.

*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

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-05-03 CVE Reserved
2019-10-23 CVE Published
2023-12-15 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/202003-10	2023-02-01
https://usn.ubuntu.com/4335-1	2023-02-01
https://www.mozilla.org/security/advisories/mfsa2019-33	2023-02-01
https://www.mozilla.org/security/advisories/mfsa2019-34	2023-02-01
https://www.mozilla.org/security/advisories/mfsa2019-35	2023-02-01
https://access.redhat.com/security/cve/CVE-2019-11759	2019-11-06
https://bugzilla.redhat.com/show_bug.cgi?id=1764440	2019-11-06

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"				< 70.0 Search vendor "Mozilla" for product "Firefox" and version " < 70.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 68.2 Search vendor "Mozilla" for product "Firefox Esr" and version " < 68.2"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 68.2 Search vendor "Mozilla" for product "Thunderbird" and version " < 68.2"		-		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