--- title: "CVE-2023-0286: X.400 address type confusion in X.509… | CubePath" description: "There is a type confusion vulnerability relating to X.400 address processing inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1_STRING…" language: en source: https://cubepath.com/security/cve/CVE-2023-0286 --- # CVE-2023-0286: X.400 address type confusion in X.509… | CubePath ## Description There is a type confusion vulnerability relating to X.400 address processing inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1\_STRING but the public structure definition for GENERAL\_NAME incorrectly specified the type of the x400Address field as ASN1\_TYPE. This field is subsequently interpreted by the OpenSSL function GENERAL\_NAME\_cmp as an ASN1\_TYPE rather than an ASN1\_STRING. When CRL checking is enabled (i.e. the application sets the X509\_V\_FLAG\_CRL\_CHECK flag), this vulnerability may allow an attacker to pass arbitrary pointers to a memcmp call, enabling them to read memory contents or enact a denial of service. In most cases, the attack requires the attacker to provide both the certificate chain and CRL, neither of which need to have a valid signature. If the attacker only controls one of these inputs, the other input must already contain an X.400 address as a CRL distribution point, which is uncommon. As such, this vulnerability is most likely to only affect applications which have implemented their own functionality for retrieving CRLs over a network. Official description from the CVE record, published by openssl. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-0286) ## Key data ### CVSS 3.1 High 7.4 Score published by CISA-ADP in the CVE record. CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | High | The attack depends on conditions outside the attacker's control, so it takes preparation. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | None | No effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.68407 (68.4% probability) Percentile 99.3% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA assessment as of Mar 6, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Automatable no Technical impact partial ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-843](https://cwe.mitre.org/data/definitions/843.html) Access of Resource Using Incompatible Type ## Affected products Products listed in the CVE record, as the CNA published them. - OpenSSL - affected: 3.0.0 up to before 3.0.8 - affected: 1.1.1 up to before 1.1.1t - affected: 1.0.2 up to before 1.0.2zg ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [OpenSSL Advisory](https://www.openssl.org/news/secadv/20230207.txt) (openssl.org) vendor-advisory - [3.0.8 git commit](https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2f7530077e0ef79d98718138716bc51ca0cad658) (git.openssl.org) patch - [1.1.1t git commit](https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2c6c9d439b484e1ba9830d8454a34fa4f80fdfe9) (git.openssl.org) patch - [1.0.2zg patch (premium)](https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=fd2af07dc083a350c959147097003a14a5e8ac4d) (git.openssl.org) patch - [ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/018\_x509.pat…](https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/018%5Fx509.patch.sig) - [ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.6.2-relnote…](https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.6.2-relnotes.txt) - [security.gentoo.org/glsa/202402-08](https://security.gentoo.org/glsa/202402-08) - [psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003) ## Timeline 1. ID reserved Jan 13, 2023 2. Record published Feb 8, 2023 3. Record last updated Oct 14, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:01 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)