Test ID:	1.3.6.1.4.1.25623.1.0.145656
Category:	Denial of Service
Title:	OpenSSL: DoS Vulnerability (CVE-2021-3449) - Linux
Summary:	OpenSSL is prone to a denial of service (DoS) vulnerability.
Description:	Summary: OpenSSL is prone to a denial of service (DoS) vulnerability. Vulnerability Insight: 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. Affected Software/OS: OpenSSL version 1.1.1 through 1.1.1j. Solution: Update to version 1.1.1k or later. CVSS Score: 4.3 CVSS Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Cross-Ref:	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-389290.pdf 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://www.oracle.com//security-alerts/cpujul2021.html https://www.oracle.com/security-alerts/cpuApr2021.html https://www.oracle.com/security-alerts/cpuapr2022.html https://www.oracle.com/security-alerts/cpujul2022.html https://www.oracle.com/security-alerts/cpuoct2021.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
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