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CVE-2022-3786

Published: 1 November 2022

A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.

Notes

AuthorNote
mdeslaur
3.x only
While developing the fix for CVE-2022-3602, a second buffer
overflow was discovered and this additional CVE was issued.
The updated packages that fix this issue ommited the CVE number
from the changelog as it was assigned at a later date.

Priority

High

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
edk2
Launchpad, Ubuntu, Debian
bionic Not vulnerable

focal Not vulnerable

jammy Not vulnerable

kinetic Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

trusty Ignored
(end of standard support)
upstream Needs triage

xenial Needs triage

nodejs
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(uses system openssl1.0)
focal Not vulnerable
(uses system openssl1.1)
jammy Not vulnerable
(uses openssl 1.1)
kinetic Not vulnerable
(uses system openssl)
lunar Not vulnerable
(uses system openssl)
mantic Not vulnerable
(uses system openssl)
trusty Not vulnerable
(uses system openssl)
upstream Needs triage

xenial Not vulnerable
(uses system openssl)
openssl
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(1.1.1-1ubuntu2.1~18.04.20)
focal Not vulnerable
(1.1.1f-1ubuntu2.16)
jammy
Released (3.0.2-0ubuntu1.7)
kinetic
Released (3.0.5-2ubuntu2)
lunar
Released (3.0.5-2ubuntu2)
mantic
Released (3.0.5-2ubuntu2)
trusty Not vulnerable

upstream
Released (3.0.7-1)
xenial Not vulnerable

openssl1.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable

focal Does not exist

jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H