CVE ID:	CVE-2021-3449
Description:	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).
Test IDs:	1.3.6.1.4.1.25623.1.0.145657   1.3.6.1.4.1.25623.1.1.2.2021.1970   1.3.6.1.4.1.25623.1.0.704875   1.3.6.1.4.1.25623.1.0.853677   1.3.6.1.4.1.25623.1.0.844880   1.3.6.1.4.1.25623.1.1.2.2021.1960   1.3.6.1.4.1.25623.1.0.145656   1.3.6.1.4.1.25623.1.1.4.2021.0954.1   1.3.6.1.4.1.25623.1.1.2.2021.2052   1.3.6.1.4.1.25623.1.1.2.2021.2063   1.3.6.1.4.1.25623.1.1.4.2021.0955.1   1.3.6.1.4.1.25623.1.1.2.2021.2020   1.3.6.1.4.1.25623.1.1.2.2021.1985   1.3.6.1.4.1.25623.1.1.2.2021.2225
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-3449 Cisco Security Advisory: 20210325 Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: March 2021 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJd https://cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=fb9fa6b51defd48157eeb207f52181f735d96148 https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845 https://kc.mcafee.com/corporate/index?page=content&id=SB10356 https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013 https://security.netapp.com/advisory/ntap-20210326-0006/ https://security.netapp.com/advisory/ntap-20210513-0002/ https://www.openssl.org/news/secadv/20210325.txt https://www.tenable.com/security/tns-2021-05 https://www.tenable.com/security/tns-2021-06 https://www.tenable.com/security/tns-2021-09 https://www.tenable.com/security/tns-2021-10 Debian Security Information: DSA-4875 (Google Search) https://www.debian.org/security/2021/dsa-4875 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/ https://security.gentoo.org/glsa/202103-03 https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc https://www.oracle.com//security-alerts/cpujul2021.html https://www.oracle.com//security-alerts/cpujul2021.html https://www.oracle.com/security-alerts/cpuApr2021.html https://www.oracle.com/security-alerts/cpuApr2021.html https://lists.debian.org/debian-lts-announce/2021/08/msg00029.html http://www.openwall.com/lists/oss-security/2021/03/27/1 http://www.openwall.com/lists/oss-security/2021/03/27/2 http://www.openwall.com/lists/oss-security/2021/03/28/3 http://www.openwall.com/lists/oss-security/2021/03/28/4