CVE-2019-3836

gnutls: invalid pointer access upon receiving async handshake messages

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer access in gnutls versions 3.6.3 or later which can be triggered by certain post-handshake messages.

Se descubrió en gnutls, antes de la versión 3.6.7 upstream, que hay un acceso de puntero no inicializado en gnutls, en versiones 3.6.4 o posteriores, que puede desencadenarse por determinados mensajes "post-handshake".

A flaw was found in the way gnutls handled malformed TLS 1.3 asynchronous messages. An attacker could use this flaw to crash an application compiled with gnutls via invalid pointer access.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-01-03 CVE Reserved
2019-04-01 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-10-01 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-456: Missing Initialization of a Variable
CWE-824: Access of Uninitialized Pointer

CAPEC

References (10)

URL	Tag	Source
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3836	Issue Tracking
https://security.netapp.com/advisory/ntap-20190502-0005	Third Party Advisory

URL	Date	SRC
https://gitlab.com/gnutls/gnutls/issues/704	2024-08-04

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00017.html	2023-11-07
https://access.redhat.com/errata/RHSA-2019:3600	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3ETBUFBB4G7AITAOUYPGXVMBGVXKUAN	2023-11-07
https://security.gentoo.org/glsa/201904-14	2023-11-07
https://usn.ubuntu.com/3999-1	2023-11-07
https://access.redhat.com/security/cve/CVE-2019-3836	2019-11-05
https://bugzilla.redhat.com/show_bug.cgi?id=1678411	2019-11-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnu Search vendor "Gnu"		Gnutls Search vendor "Gnu" for product "Gnutls"				>= 3.6.3 < 3.6.7 Search vendor "Gnu" for product "Gnutls" and version " >= 3.6.3 < 3.6.7"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				28 Search vendor "Fedoraproject" for product "Fedora" and version "28"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.0 Search vendor "Opensuse" for product "Leap" and version "15.0"		-		Affected