CVE-2022-3786 X.509 Email Address Variable Length Buffer Overflow

What is CVE-2022-3786?

CVE-2022-3786 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 1 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-120

Which versions are affected by CVE-2022-3786?

5 open source packages ship an affected version, including openssl-src, node and node-min. It affects 3 products.

Products include Fedoraproject Fedora, Nodejs Node.js, Openssl Openssl.

How do I fix CVE-2022-3786?

Upgrade openssl-src to 300.0.11 or later.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2022-3786 being exploited?

There is no known exploitation of CVE-2022-3786 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2022-3786, BIT-node-2022-3786, BIT-node-min-2022-3786, CLEANSTART-2026-NT43765, CLEANSTART-2026-PY31996, DEBIAN-CVE-2022-3786 and 3 more.