# CVE-2021-3450: OpenSSL: CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT

CVE-2021-3450 is fixed in 6 products on 1 platform, first by RHSA-2021:1024, released March 30, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-3450
- Priority: High
- CVSS: 7.4 (Important)
- EPSS: 0.1834
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Unlikely
- Published: Mar 30, 2021
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-3450

## Description

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.  Security Fix(es):  * openssl: NULL pointer dereference in signature_algorithms processing (CVE-2021-3449)  * openssl: CA certificate check bypass with X509_V_FLAG_X509_STRICT (CVE-2021-3450)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | openssl RHEL 8 | 1:1.1.1g-15.el8_3 | [RHSA-2021:1024](https://patchblox.com/security/data/fix/linux/rhsa-2021-1024.md) | Mar 30, 2021 |
| Linux | openssl ol 8 | 2:1.1.1g-15.ksplice1.el8_3 | [ELSA-2021-9151](https://patchblox.com/security/data/fix/linux/elsa-2021-9151.md) | Apr 1, 2021 |
| Linux | openssl-debugsource ol 8 | 2:1.1.1g-15.ksplice1.el8_3 | [ELSA-2021-9151](https://patchblox.com/security/data/fix/linux/elsa-2021-9151.md) | Apr 1, 2021 |
| Linux | openssl-devel RHEL 8 | 1:1.1.1g-15.el8_3 | [RHSA-2021:1024](https://patchblox.com/security/data/fix/linux/rhsa-2021-1024.md) | Mar 30, 2021 |
| Linux | openssl-devel ol 8 | 2:1.1.1g-15.ksplice1.el8_3 | [ELSA-2021-9151](https://patchblox.com/security/data/fix/linux/elsa-2021-9151.md) | Apr 1, 2021 |
| Linux | openssl-libs RHEL 8 | 1:1.1.1g-15.el8_3 | [RHSA-2021:1024](https://patchblox.com/security/data/fix/linux/rhsa-2021-1024.md) | Mar 30, 2021 |
| Linux | openssl-libs ol 8 | 2:1.1.1g-15.ksplice1.el8_3 | [ELSA-2021-9151](https://patchblox.com/security/data/fix/linux/elsa-2021-9151.md) | Apr 1, 2021 |
| Linux | openssl-perl RHEL 8 | 1:1.1.1g-15.el8_3 | [RHSA-2021:1024](https://patchblox.com/security/data/fix/linux/rhsa-2021-1024.md) | Mar 30, 2021 |
| Linux | openssl-perl ol 8 | 2:1.1.1g-15.ksplice1.el8_3 | [ELSA-2021-9151](https://patchblox.com/security/data/fix/linux/elsa-2021-9151.md) | Apr 1, 2021 |
| Linux | openssl-static ol 8 | 2:1.1.1g-15.ksplice1.el8_3 | [ELSA-2021-9151](https://patchblox.com/security/data/fix/linux/elsa-2021-9151.md) | Apr 1, 2021 |

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