An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).
CVSS Details
- CVSS 3.1 Base Score: 5.9
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade openssl-libsUpgrade opensslUpgrade openssl-perlUpgrade openssl-devel | May 4, 2022 | Mar 25, 2021 |
| Alpine Linux | — | Upgrade openssl3Upgrade opensslUpgrade synapseUpgrade openssl1.1-compat | Jun 17, 2022 | Mar 25, 2021 |
| Amazon Linux Ami 2 | — | Upgrade edk2-tools-docUpgrade openssl11-libsUpgrade edk2-toolsUpgrade edk2-aarch64Upgrade edk2-ovmfUpgrade openssl11-develUpgrade openssl11-staticUpgrade openssl11Upgrade openssl11-debuginfoUpgrade edk2-tools-pythonUpgrade edk2-debuginfo | Mar 29, 2021 | Mar 25, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Mar 25, 2021 |
| Centos_linux | — | Upgrade opensslUpgrade openssl-debugsourceUpgrade openssl-libs-debuginfoUpgrade openssl-perlUpgrade openssl-develUpgrade openssl-libsUpgrade openssl-debuginfo | Mar 31, 2021 | Mar 25, 2021 |
| Check Point Gaia | — | Upgrade to supported version Check Point Gaia. | Feb 25, 2026 | Apr 10, 2021 |
| Debian | — | Upgrade openssl | Mar 29, 2021 | Mar 25, 2021 |
| Freebsd | — | Upgrade mariadb104-serverUpgrade node12Upgrade mysql80-serverUpgrade node14Upgrade nodeUpgrade FreeBSDUpgrade mysql57-serverUpgrade node10Upgrade mariadb103-serverUpgrade opensslUpgrade mariadb105-serverUpgrade mysql56-server | Apr 20, 2021 | Apr 20, 2021 |
| Gentoo Linux | — | Upgrade dev-libs/openssl. | Apr 1, 2021 | Mar 25, 2021 |
| Http Openssl | — | Upgrade to the latest version of OpenSSL | Mar 26, 2021 | Mar 25, 2021 |
| Huawei Euleros 2_0_sp5 | — | Upgrade openssl111dUpgrade openssl111d-libsUpgrade openssl111d-develUpgrade openssl111d-static | Jul 19, 2021 | Mar 25, 2021 |
| Huawei Euleros 2_0_sp8 | — | Upgrade openssl-perlUpgrade opensslUpgrade openssl-develUpgrade openssl-libs | Jun 28, 2021 | Mar 25, 2021 |
| Huawei Euleros 2_0_sp9 | — | Upgrade opensslUpgrade openssl-libsUpgrade openssl-perl | Jul 2, 2021 | Mar 25, 2021 |
| Mcafee Web Gateway | — | Upgrade to the latest version of Web Gateway | Sep 23, 2026 | Mar 25, 2021 |
| Microsoft Visual_studio | — | Update Microsoft Visual Studio 2017 to the latest version in the LTSC 15.9 version stream, or upgrade to a newer supported version of Visual Studio 2017.Update Microsoft Visual Studio 2019 to the latest version in the LTSC 16.4 version stream, or upgrade to a newer supported version of Visual Studio 2019.Update Microsoft Visual Studio 2019 to the latest version in the LTSC 16.11 version stream, or upgrade to a newer supported version of Visual Studio 2019.Update Microsoft Visual Studio 2019 to the latest version in the LTSC 16.9 version stream, or upgrade to a newer supported version of Visual Studio 2019.Update Microsoft Visual Studio 2019 to the latest version in the LTSC 16.7 version stream, or upgrade to a newer supported version of Visual Studio 2019. | Jun 25, 2025 | Oct 12, 2021 |
| Oracle Mysql | — | Upgrade to MySQL version 8.0.24Upgrade to MySQL version 5.7.34 | Jun 15, 2026 | Mar 25, 2021 |
| Oracle Solaris | — | Upgrade library/security/openssl-11 to version 1.1.1.11-11.4.35.0.1.94.2 on Solaris 11.4Upgrade database/mysql-57/tests to version 5.7.34-11.4.35.0.1.94.2 on Solaris 11.4Upgrade database/mysql-57 to version 5.7.34-11.4.35.0.1.94.2 on Solaris 11.4Upgrade runtime/nodejs/nodejs-12 to version 12.22.1-11.4.36.0.1.101.0 on Solaris 11.4Upgrade library/security/openssl/openssl-fips-140 to version 2.0.15-11.4.36.0.1.101.0 on Solaris 11.4Upgrade database/mysql-57/library to version 5.7.34-11.4.35.0.1.94.2 on Solaris 11.4Upgrade runtime/nodejs/nodejs-14 to version 14.17.0-11.4.36.0.1.101.0 on Solaris 11.4Upgrade database/mysql-57/client to version 5.7.34-11.4.35.0.1.94.2 on Solaris 11.4Upgrade database/mysql-57/embedded to version 5.7.34-11.4.35.0.1.94.2 on Solaris 11.4Upgrade runtime/nodejs to version 14.17.0-11.4.36.0.1.101.0 on Solaris 11.4Upgrade library/security/openssl to version 1.0.2.25-11.4.36.0.1.101.0 on Solaris 11.4 | Jul 21, 2021 | Mar 25, 2021 |
| Oracle_linux | — | Upgrade openssl-libsUpgrade openssl-develUpgrade openssl-debugsourceUpgrade opensslUpgrade openssl-staticUpgrade openssl-perl | Mar 30, 2021 | Mar 25, 2021 |
| Redhat_linux | — | Upgrade openssl-libsUpgrade openssl-develUpgrade openssl-perlUpgrade openssl-debuginfoUpgrade opensslUpgrade openssl-debugsourceUpgrade openssl-libs-debuginfo | Mar 31, 2021 | Mar 25, 2021 |
| Rocky_linux | — | Upgrade openssl-debuginfoUpgrade openssl-libsUpgrade openssl-libs-debuginfoUpgrade openssl-perlUpgrade openssl-develUpgrade openssl-debugsourceUpgrade openssl | Mar 12, 2024 | Mar 25, 2021 |
| Sonicwall Email Security | — | Update SonicWall Email Security to version 10.0.11 or later | Sep 22, 2025 | Jul 16, 2021 |
| Sonicwall Email Security Appliances | — | — | Sep 4, 2025 | Jul 15, 2021 |
| Sonicwall Sonicos | — | Update SonicWall SonicOS Gen7 to version 7.0.1-R1456 or later | May 25, 2026 | Jul 16, 2021 |
| Suse | — | Upgrade libopenssl-1_1-develUpgrade nodejs12Upgrade nodejs12-docsUpgrade libopenssl-1_1-devel-32bitUpgrade nodejs12-develUpgrade nodejs10Upgrade npm12Upgrade nodejs10-docsUpgrade libopenssl1_1-hmacUpgrade libopenssl1_1-32bitUpgrade libopenssl1_1Upgrade libopenssl1_1-hmac-32bitUpgrade openssl-1_1-docUpgrade openssl-1_1Upgrade nodejs10-develUpgrade npm10 | Mar 26, 2021 | Mar 25, 2021 |
| Ubuntu | — | Upgrade libssl1.1Upgrade postgresql-10Upgrade postgresql-12Upgrade postgresql-13 | Mar 26, 2021 | Mar 25, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 25, 2021 |
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