Oracle Linux 8 : openssl (ELSA-2021-1024)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-1024 advisory. - CVE-2021-3450 openssl: CA certificate check bypass with X509VFLAGX509STRICT Tenable has extracted the preceding description block directly from the...

Tenable.sc 5.16.0 / 5.17.0 OpenSSL DoS (TNS-2021-06)

According to its self-reported version, the Tenable.sc application installed on the remote host is version 5.16.0 or 5.17.0 and affected by the following OpenSSL denial of service vulnerability: - An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from...

openssl: NULL pointer dereference in signature_algorithms processing

A flaw was found in openssl. A server crash and denial of service attack could occur if a client sends a TLSv1.2 renegotiation ClientHello and omits the signaturealgorithms extension but includes a signaturealgorithmscert extension. The highest threat from this vulnerability is to system...

Tenable SecurityCenter 5.13.x < 5.18.0 DoS (TNS-2021-06)

According to its self-reported version, the Tenable SecurityCenter application installed on the remote host is version 5.13.x 5.18.0 and affected by the following OpenSSL denial of service vulnerability: - An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello...

openssl: NULL pointer dereference in signature_algorithms processing

A flaw was found in openssl. A server crash and denial of service attack could occur if a client sends a TLSv1.2 renegotiation ClientHello and omits the signaturealgorithms extension but includes a signaturealgorithmscert extension. The highest threat from this vulnerability is to system...

OpenSSL Releases Patches for 2 High-Severity Security Vulnerabilities

The maintainers of OpenSSL have released a fix for two high-severity security flaws in its software that could be exploited to carry out denial-of-service DoS attacks and bypass certificate verification. Tracked as CVE-2021-3449 and CVE-2021-3450 , both the vulnerabilities have been resolved in a...

Exploit for NULL Pointer Dereference in Openssl

CVE-2021-3449 OpenSSL This issue was reported to OpenSSL on 1...

OpenSSL: DoS Vulnerability (CVE-2021-3449) - Windows

OpenSSL is prone to a denial of service DoS vulnerability. Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; yo...

OpenSSL: DoS Vulnerability (CVE-2021-3449) - Linux

OpenSSL is prone to a denial of service DoS vulnerability. Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; yo...

CVE-2021-3449

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 signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

CVE-2021-3449

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 signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

DEBIAN-CVE-2021-3449

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 signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

ALPINE-CVE-2021-3449

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 signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

USN-4891-1 openssl vulnerability

It was discovered that OpenSSL incorrectly handled certain renegotiation ClientHello messages. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service...

EUVD-2021-1628

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 signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

UBUNTU-CVE-2021-3449

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 signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

OpenSSL TLS Server Crash (NULL pointer dereference) — CVE-2021-3449

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 signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

CVE-2021-3449

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 signaturealgorithms extension where it was present in the initial ClientHello, but includes a signaturealgorithmscert extension then a NU...

Vulnerabilities fixed in OpenSSL

Two vulnerabilities have been fixed in OpenSSL. A malicious party could potentially exploit the vulnerability with reference CVE-2021-3449 potentially exploit it to cause a denial-of-service. To do this requires sending a specially prepared "renegotiation ClientHello" message needs to be sent fro...

Security Bulletin: IBM® Db2® may be vulnerable to a Denial of Service attack (CVE-2020-4355)

Summary IBM® Db2® is vulnerable to a denial of service, caused by improper handling of Secure Sockets Layer SSL renegotiation requests. By sending specially-crafted requests, a remote attacker could exploit this vulnerability to increase the resource usage on the system. Vulnerability Details...