PT-2020-12911 · Zoom · Zoom Client For Meetings

Name of the Vulnerable Software and Affected Versions: Zoom Client for Meetings version 4.6.11 Description: The issue concerns the use of a static Initialization Vector IV for AES-256 CBC encryption in the airhost.exe component. Specifically, the IV used is 3423423432325249. The vendor notes that...

The vulnerability of the implementation of the HMAC-SHA-256 mechanism in the GnuTLS cryptographic library allows a perpetrator to carry out an “Lucky 13” attack and a attack that recovers the plaintext.

The vulnerability of the HMAC-SHA-256 mechanism implemented in the GnuTLS cryptographic library is related to errors in the implementation of the cryptographic algorithm. Exploiting this vulnerability allows a malicious actor to perform both a “Lucky 13” attack and an attack that recovers the...

Insecure TLS Configuration

seamonkey uses an insecure TLS configuration. It was found that the SSL DHE Diffie-Hellman Ephemeral mode implementation for key exchanges in SeaMonkey accepted DHE keys that were 256 bits in length. This update removes support for 256 bit DHE keys, as such keys are easily broken using modern...

Loncom packer: from backdoors to Cobalt Strike

The previous story described an unusual way of distributing malware under disguise of an update for an expired security certificate. After the story went out, we conducted a detailed analysis of the samples we had obtained, with some interesting findings. All of the malware we examined from the...

Ninja - Open Source C2 Server Created For Stealth Red Team Operations

Ninja C2 is an Open source C2 server created by Purple Team to do stealthy computer and Active directoty enumeration without being detected by SIEM and AVs , Ninja still in beta version and when the stable version released it will contains many more stealthy techinques and anti-forensic to create...

get_Team_Pass - Get Teamviewer's ID And Password From A Remote Computer In The LAN

Get teamviewer's ID and password from a remote computer in the LAN This program gets teamviewer's ID and password from a remote computer in the LAN. Most useful for postexploitation or sysadmins Tested on windows 7 and windows 10 x86 and x64 Prerequisites You must have valid credentials on the...

VMware Carbon Black TAU: Ryuk Ransomware Technical Analysis

Ryuk Ransomware has been crippling both the public and private sector recently with the ability to disrupt its target environment. The ransomware will typically be dropped by an already compromised system that has been infected by Trickbot or Emotet through a phishing email. Once the Ryuk payload...

Bit Flipping Attack

parsel is vulnerable to bit flipping attack. The use of an insecure cryptographic algorithm aes-256-cbc without any integrity checks causes its ciphertext to be easily broken by bit-flipping attacks...

Insecure Cryptography Algorithm

Overview All versions of parsel use an insecure cryptography algorithm. The package uses aes-256-cbc without integrity checks, which renders the ciphertext vulnerable to bit-flipping attacks. Recommendation The package is deprecated and will not be updated. Consider using an alternative package...

Huawei EulerOS: Security Advisory for gnutls (EulerOS-SA-2018-1444)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2020 Greenbone AG 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-only ifdescription...

Huawei EulerOS: Security Advisory for golang (EulerOS-SA-2017-1225)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2020 Greenbone AG 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-only ifdescription...

Huawei EulerOS: Security Advisory for gnutls (EulerOS-SA-2019-1203)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2020 Greenbone AG 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-only ifdescription...

Huawei EulerOS: Security Advisory for gnutls (EulerOS-SA-2019-1005)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2020 Greenbone AG 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-only ifdescription...

CVE-2018-10844

It was found that GnuTLS's implementation of HMAC-SHA-256 was vulnerable to Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets...

Stowaway - Multi-hop Proxy Tool For Pentesters

Stowaway is Multi-hop proxy tool for security researchers and pentesters Users can easily proxy their network traffic to intranet nodes multi-layer PS: The files under demo folder are Stowaway's beta version,it's still functional, you can check the detail by README.md file under the demo folder...

Nextcloud: Improper confidentiality protection of server-side encryption keys

This vulnerability is related to the Improper integrity protection of server-side encryption keys vulnerability but leverages a different attack vector. While the previous attack broke the confidentiality of encrypted files because the public keys are not integrity-protected, this new attack brea...

Nextcloud: Downgrade encryption scheme and break integrity through known-plaintext attack

The idea behind the Server Side Encryption is that you can move your encrypted files to an external party without that external party being able to to read or modify those files. Some time ago, Nextcloud switched from unauthenticated CFB cipher block mode to authenticated CTR cipher block mode in...

Rainbow Crackalack - Rainbow Table Generation And Lookup Tools

This project produces open-source code to generate rainbow tables as well as use them to look up password hashes. While the current release only supports NTLM, future releases aim to support MD5, SHA-1, SHA-256, and possibly more. Both Linux and Windows are supported! For more information, see th...

Ruby on Rails: The authenticity_token can be reversed and used to forge valid per_form_csrf_tokens for arbitrary routes

When performcsrftokens is set to true, each form should protected against CSRF with a unique token that is not predictable by an attacker. Theperformcsrftoken is generated using a HMAC SHA-256 using a key that is exposed in a reversed authenticitytoken. The authenticitytoken is a Base64 encoding ...

Cryptovenom - The Cryptography Swiss Army Knife

CryptoVenom: The Cryptography Swiss Army knife What is CryptoVenom? CryptoVenom is an OpenSource tool which contains a lot of cryptosystems and cryptoanalysis methods all in one, including classical algorithms, hash algorithms, encoding algorithms, logic gates, mathematical functions, modern...