Test ID:	1.3.6.1.4.1.25623.1.0.108753
Category:	Denial of Service
Title:	OpenSSL: Segmentation fault in SSL_check_chain (CVE-2020-1967) - Linux
Summary:	OpenSSL server or client applications are prone to a; denial-of-service vulnerability.
Description:	Summary: OpenSSL server or client applications are prone to a denial-of-service vulnerability. Vulnerability Insight: Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the 'signature_algorithms_cert' TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. Vulnerability Impact: This could be exploited by a malicious peer in a Denial of Service attack. Affected Software/OS: OpenSSL versions 1.1.1d, 1.1.1e, and 1.1.1f. This issue does not impact OpenSSL versions prior to 1.1.1d. Solution: Update to version 1.1.1g or later. See the references for more details. CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2020-1967 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1 https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44440 https://security.netapp.com/advisory/ntap-20200424-0003/ https://security.netapp.com/advisory/ntap-20200717-0004/ https://www.openssl.org/news/secadv/20200421.txt https://www.synology.com/security/advisory/Synology_SA_20_05 https://www.synology.com/security/advisory/Synology_SA_20_05_OpenSSL https://www.tenable.com/security/tns-2020-03 https://www.tenable.com/security/tns-2020-04 https://www.tenable.com/security/tns-2020-11 https://www.tenable.com/security/tns-2021-10 Debian Security Information: DSA-4661 (Google Search) https://www.debian.org/security/2020/dsa-4661 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EXDDAOWSAIEFQNBHWYE6PPYFV4QXGMCD/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XVEP3LAK4JSPRXFO4QF4GG2IVXADV3SO/ FreeBSD Security Advisory: FreeBSD-SA-20:11 https://security.FreeBSD.org/advisories/FreeBSD-SA-20:11.openssl.asc http://seclists.org/fulldisclosure/2020/May/5 https://security.gentoo.org/glsa/202004-10 http://packetstormsecurity.com/files/157527/OpenSSL-signature_algorithms_cert-Denial-Of-Service.html https://github.com/irsl/CVE-2020-1967 https://www.oracle.com//security-alerts/cpujul2021.html https://www.oracle.com/security-alerts/cpuApr2021.html https://www.oracle.com/security-alerts/cpujan2021.html https://www.oracle.com/security-alerts/cpujul2020.html https://www.oracle.com/security-alerts/cpuoct2020.html https://www.oracle.com/security-alerts/cpuoct2021.html http://www.openwall.com/lists/oss-security/2020/04/22/2 https://lists.apache.org/thread.html/r66ea9c436da150683432db5fbc8beb8ae01886c6459ac30c2cea7345@%3Cdev.tomcat.apache.org%3E https://lists.apache.org/thread.html/r9a41e304992ce6aec6585a87842b4f2e692604f5c892c37e3b0587ee@%3Cdev.tomcat.apache.org%3E https://lists.apache.org/thread.html/r94d6ac3f010a38fccf4f432b12180a13fa1cf303559bd805648c9064@%3Cdev.tomcat.apache.org%3E SuSE Security Announcement: openSUSE-SU-2020:0933 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00004.html SuSE Security Announcement: openSUSE-SU-2020:0945 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00011.html
Copyright	Copyright (C) 2020 Greenbone AG

This is only one of 145615 vulnerability tests in our test suite. Find out more about running a complete security audit. To run a free test of this vulnerability against your system, register below.