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CVE-2022-3602

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 the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution. Many platforms implement stack overflow protections which would mitigate against the risk of remote code execution. The risk may be further mitigated based on stack layout for any given platform/compiler. Pre-announcements of CVE-2022-3602 described this issue as CRITICAL. Further analysis based on some of the mitigating factors described above have led this to be downgraded to HIGH. Users are still encouraged to upgrade to a new version as soon as possible. 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. Fixed in OpenSSL 3.0.7 (Affected 3.0.0,3.0.1,3.0.2,3.0.3,3.0.4,3.0.5,3.0.6).

Notes

AuthorNote
mdeslaur
3.x only
Ubuntu packages are built with stack protector, reducing the
impact of this CVE from remote code execution to a denial of
service.
Priority

High

CVSS 3 base score: 7.5

Status

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

focal Not vulnerable

jammy Not vulnerable

kinetic Not vulnerable

trusty Ignored
(out of standard support)
upstream Needs triage

xenial Ignored
(end of standard support)
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)
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)
trusty Not vulnerable

upstream
Released (3.0.7-1)
xenial Not vulnerable

This vulnerability is mitigated in part by the use of gcc's stack protector in Ubuntu.
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