PUB-A-194697257

In TBD of TBD, there is a possible downgrade attack due to under utilized anti-rollback protections. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation...

A bug is about to confuse a lot of computers by turning back time 20 years

For those of you that remember the fuss about the Y2K bug, this story may sound familiar. The Cybersecurity & Infrastructure Security Agency CISA has issued a warning to Critical Infrastructure CI owners and operators, and other users who get the time from GPS, about a GPS Daemon GPSD bug in GPSD...

CVE-2021-41135

The Cosmos-SDK is a framework for building blockchain applications in Golang. Affected versions of the SDK were vulnerable to a consensus halt due to non-deterministic behaviour in a ValidateBasic method in the x/authz module. The MsgGrant of the x/authz module contains a Grant field which includ...

Linux kernel 缓冲区错误漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in versions of Linux kernel prior to 5.8.10, which stems from improper handling of software rollback by the vgacon subsystem in the Linux kernel...

Amazon Linux 2 : openssl11 (ALAS-2021-1612)

The version of openssl11 installed on the remote host is prior to 1.1.1g-12. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1612 advisory. Calls to EVPCipherUpdate, EVPEncryptUpdate and EVPDecryptUpdate may overflow the output length argument in some cases...

Security Bulletin: A vulnerabbility exists in the IBM® SDK, Java™ Technology Edition affect IBM Tivoli Network Configuration Manager (CVE-2020-14779, CVE-2020-14792, CVE-2020-14796, CVE-2020-14797, CVE-2020-14798).

Summary A vulnerability exists in IBM® SDK Java™ Technology Edition, Version 8, which is used by IBM Tivoli Network Configuration Manager IP Edition v6.4.2, which was disclosed in the Oracle October 2020 Critical Patch Update. Vulnerability Details Refer to the security bulletins listed in the...

Medium: openssl

Issue Overview: OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS...

OpenSSL 1.0.2 < 1.0.2y Multiple Vulnerabilities

The version of OpenSSL installed on the remote host is prior to 1.0.2y. It is, therefore, affected by multiple vulnerabilities as referenced in the 1.0.2y advisory. - The OpenSSL public API function X509issuerandserialhash attempts to create a unique hash value based on the issuer and serial numb...

CVE-2021-23839

A flaw was found in openssl. OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. However since there is...

Authorization Bypass

openssl is vulnerable to authorization bypass. The vulnerability exists when a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients...

OpenSSL: Incorrect SSLv2 rollback protection (CVE-2021-23839) - Linux

OpenSSL is prone to an incorrect SSLv2 rollback protection 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 fr...

OpenSSL: Incorrect SSLv2 rollback protection (CVE-2021-23839) - Windows

OpenSSL is prone to an incorrect SSLv2 rollback protection 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 fr...

CVE-2021-23839

OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater th...

CVE-2021-23839

OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater th...

DEBIAN-CVE-2021-23839

OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater th...

ALPINE-CVE-2021-23839

OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater th...

Design/Logic Flaw

OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater th...

CVE-2021-23839

OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater th...

CVE-2021-23839 Incorrect SSLv2 rollback protection

OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater th...

CVE-2021-23839

CVE-2021-23839 describes a padding-check logic error in OpenSSL 1.0.2 (affecting 1.0.2s–1.0.2x) where RSA_padding_check_SSLv23() mis-handles SSLv2 rollback protection. The bug causes a server configured for SSLv2 in combination with newer TLS versions to accept connections when a version-rollback...