This archive contains proof of concepts and a whitepaper that describes multiple email client implementations where popular clients for email are vulnerable to signature spoofing attacks.

Ubuntu Security Notice 3964-1 - Marcus Brinkmann discovered that GnuPG before 2.2.8 improperly handled certain command line parameters. A remote attacker could use this to spoof the output of GnuPG and cause unsigned e-mail to appear signed. It was discovered that python-gnupg incorrectly handled the GPG passphrase. A remote attacker could send a specially crafted passphrase that would allow them to control the output of encryption and decryption operations. Various other issues were also addressed.

Ubuntu Security Notice 3991-1 - Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, spoof the browser UI, trick the user in to launching local executable binaries, obtain sensitive information, conduct cross-site scripting attacks, or execute arbitrary code. Various other issues were also addressed.

Debian Linux Security Advisory 4457-1 - Hanno Böck discovered that Evolution was vulnerable to OpenPGP signatures being spoofed for arbitrary messages using a specially crafted HTML email. This issue was mitigated by moving the security bar with encryption and signature information above the message headers.

pArAnoIA is a toolkit designed to surf the Internet. It's a browser with TOR built-in, spoofing of user-agent and other functions, ensures strict use of TLS, and more.

Debian Linux Security Advisory 4479-1 - Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, cross-site scripting, spoofing, information disclosure, denial of service or cross-site request forgery.

Ubuntu Security Notice 4054-1 - A sandbox escape was discovered in Firefox. If a user were tricked in to installing a malicious language pack, an attacker could exploit this to gain additional privileges. Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass same origin restrictions, conduct cross-site scripting attacks, conduct cross-site request forgery attacks, spoof origin attributes, spoof the addressbar contents, bypass safebrowsing protections, or execute arbitrary code. Various other issues were also addressed.

Debian Linux Security Advisory 4482-1 - Multiple security issues have been found in Thunderbird which could potentially result in the execution of arbitrary code, cross-site scripting, spoofing, information disclosure, denial of service or cross-site request forgery.

SAPUI5 version 1.0.0 and the SAP Gateway versions 7.5, 7.51, 7.52 and 7.53are vulnerable to content spoofing in multiple parameters.

Ubuntu Security Notice 4064-1 - A sandbox escape was discovered in Thunderbird. If a user were tricked in to installing a malicious language pack, an attacker could exploit this to gain additional privileges. Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, bypass same origin restrictions, conduct cross-site scripting attacks, spoof origin attributes, or execute arbitrary code. Various other issues were also addressed.

Ubuntu Security Notice 4054-2 - USN-4054-1 fixed vulnerabilities in Firefox. The update introduced various minor regressions. This update fixes the problems. A sandbox escape was discovered in Firefox. If a user were tricked in to installing a malicious language pack, an attacker could exploit this to gain additional privileges. Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass same origin restrictions, conduct cross-site scripting attacks, conduct cross-site request forgery attacks, spoof origin attributes, spoof the addressbar contents, bypass safebrowsing protections, or execute arbitrary code. It was discovered that Firefox treats all files in a directory as same origin. If a user were tricked in to downloading a specially crafted HTML file, an attacker could potentially exploit this to obtain sensitive information from local files. Various other issues were also addressed.

Open-Xchange OX App Suite suffers from a content spoofing, cross site scripting, and information disclosure vulnerabilities. Versions affected vary depending on the vulnerability.

Zyxel USG/UAG/ATP/VPN/NXC series suffer from an issue where a DNS request can be made by an unauthenticated attacker to either spam a DNS service of a third party with requests that have a spoofed origin or probe whether domain names are present on the internal network behind the firewall.

Debian Linux Security Advisory 4524-1 - Multiple vulnerabilities have been discovered in the Dino XMPP client, which could allow spoofing message, manipulation of a user's roster (contact list) and unauthorised sending of message carbons.

Apple Security Advisory 2019-9-26-9 - Safari 13.0.1 addresses user interface spoofing and browser history leakage vulnerabilities.

A FortiSIEM collector connects to a Supervisor/Worker over HTTPS TLS (443/TCP) to register itself as well as relaying event data such as syslog, netflow, SNMP, etc. When the Collector (the client) connects to the Supervisor/Worker (the server), the client does not validate the server-provided certificate against its root-CA store. Since the client does no server certificate validation, this means any certificate presented to the client will be considered valid and the connection will succeed. If an attacker spoofs a Worker/Supervisor using an ARP or DNS poisoning attack (or any other MITM attack), the Collector will blindly connect to the attacker's HTTPS TLS server. It will disclose the authentication password used along with any data being relayed. Versions 5.0 and 5.2.1 have been tested and are affected.

Ubuntu Security Notice 4202-2 - USN-4202-1 fixed vulnerabilities in Thunderbird. After upgrading, Thunderbird created a new profile for some users. This update fixes the problem. It was discovered that a specially crafted S/MIME message with an inner encryption layer could be displayed as having a valid signature in some circumstances, even if the signer had no access to the encrypted message. An attacker could potentially exploit this to spoof the message author. Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, bypass security restrictions, bypass same-origin restrictions, conduct cross-site scripting attacks, or execute arbitrary code. A heap overflow was discovered in the expat library in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code.

Windows Defender Antivirus version 4.18.1908.7-0 suffers from a file extension spoofing vulnerability.

This is a proof of concept exploit that demonstrates the Microsoft Windows CryptoAPI spoofing vulnerability as described in CVE-2020-0601 and disclosed by the NSA.

Apple Security Advisory 2020-1-28-5 - Safari 13.0.5 is now available and addresses address bar spoofing and password disclosure in transit issues.

UFONet abuses OSI Layer 7-HTTP to create/manage 'zombies' and to conduct different attacks using GET/POST, multithreading, proxies, origin spoofing methods, cache evasion techniques, etc.

Google Invisible RECAPTCHA version 3 suffers from a spoofing bypass vulnerability.

Ubuntu Security Notice 4299-1 - Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, spoof the URL or other browser chrome, obtain sensitive information, bypass Content Security Policy protections, or execute arbitrary code. Various other issues were also addressed.

Red Hat Security Advisory 2020-1080-01 - Evolution is a GNOME application that provides integrated email, calendar, contact management, and communications functionality. The evolution-data-server packages provide a unified back end for applications which interact with contacts, tasks and calendar information. Issues addressed include OpenPGP signature spoofing and certificate errors being ignored.

Red Hat Security Advisory 2020-1600-01 - Evolution is a GNOME application that provides integrated email, calendar, contact management, and communications functionality. The evolution-data-server packages provide a unified back end for applications which interact with contacts, tasks and calendar information. Evolution Data Server was originally developed as a back end for the Evolution information management application, but is now used by various other applications. Issues addressed include a spoofing vulnerability.

Red Hat Security Advisory 2020-1047-01 - The wireshark packages contain a network protocol analyzer used to capture and browse the traffic running on a computer network. Issues addressed include crash and out of bounds read vulnerabilities.

Red Hat Security Advisory 2020-1084-01 - Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information.

Red Hat Security Advisory 2020-1167-01 - Network Block Device is a protocol for accessing hard disks and other disk-like devices over the network. The nbdkit toolkit utilizes NBD to create servers with minimal dependencies. The package contains plug-in support for the C and Python programming languages. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2020-1081-01 - The net-snmp packages provide various libraries and tools for the Simple Network Management Protocol, including an SNMP library, an extensible agent, tools for requesting or setting information from SNMP agents, tools for generating and handling SNMP traps, a version of the netstat command which uses SNMP, and a Tk/Perl Management Information Base browser. Issues addressed include denial of service and null pointer vulnerabilities.

Red Hat Security Advisory 2020-1045-01 - LFTP is a file transfer utility for File Transfer Protocol, Secure File Transfer Protocol, Hypertext Transfer Protocol, and other commonly used protocols. It uses the readline library for input, and provides support for bookmarks, built-in monitoring, job control, and parallel transfer of multiple files at the same time.

Gentoo Linux Security Advisory 202004-6 - A regression in GnuTLS breaks the security guarantees of the DTLS protocol. Versions less than 3.6.13 are affected.

Red Hat Security Advisory 2020-1318-01 - Telnet is a popular protocol for logging in to remote systems over the Internet. The telnet-server packages include a telnet service that supports remote logins into the host machine. The telnet service is disabled by default. An arbitrary code execution vulnerability was addressed.

Red Hat Security Advisory 2020-1335-01 - Telnet is a popular protocol for logging in to remote systems over the Internet. The telnet-server packages include a telnet service that supports remote logins into the host machine. The telnet service is disabled by default. An arbitrary code execution vulnerability was addressed.

Red Hat Security Advisory 2020-1334-01 - Telnet is a popular protocol for logging in to remote systems over the Internet. The telnet-server packages include a telnet service that supports remote logins into the host machine. The telnet service is disabled by default. An arbitrary code execution vulnerability was addressed.

A vulnerability exists within the Microsoft Server Message Block 3.1.1 (SMBv3) protocol that can be leveraged to execute code on a vulnerable server. This local exploit implementation leverages this flaw to elevate itself before injecting a payload into winlogon.exe.

Red Hat Security Advisory 2020-1342-01 - Telnet is a popular protocol for logging in to remote systems over the Internet. The telnet-server packages include a telnet service that supports remote logins into the host machine. The telnet service is disabled by default. Issues addressed include a code execution vulnerability.

Red Hat Security Advisory 2020-1445-01 - AMQ Broker is a high-performance messaging implementation based on ActiveMQ Artemis. It uses an asynchronous journal for fast message persistence, and supports multiple languages, protocols, and platforms. This release of Red Hat AMQ Broker 7.4.3 serves as a replacement for Red Hat AMQ Broker 7.4.2, and includes security and bug fixes, and enhancements. For further information, refer to the release notes linked to in the References section. Issues addressed include cross site scripting, denial of service, and information leakage vulnerabilities.

Red Hat Security Advisory 2020-1470-01 - The Network Time Protocol is used to synchronize a computer's time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service. Issues addressed include buffer overflow, code execution, and denial of service vulnerabilities.

A git clone action can leak cached / stored credentials for github.com to example.com due to insecure handling of newlines in the credential helper protocol.

testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws, and much more. It is written in (pure) bash, makes only use of standard Unix utilities, openssl and last but not least bash sockets.

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols with full-strength cryptography world-wide.

Red Hat Security Advisory 2020-1840-01 - OpenSSL is a toolkit that implements the Secure Sockets Layer and Transport Layer Security protocols, as well as a full-strength general-purpose cryptography library. Issues addressed include an information leakage vulnerability.

Red Hat Security Advisory 2020-1878-01 - Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information.

Red Hat Security Advisory 2020-1845-01 - The Berkeley Internet Name Domain is an implementation of the Domain Name System protocols. BIND includes a DNS server ; a resolver library ; and tools for verifying that the DNS server is operating correctly.

The openscap project is a set of open source libraries that support the SCAP (Security Content Automation Protocol) set of standards from NIST. It supports CPE, CCE, CVE, CVSS, OVAL, and XCCDF.

Red Hat Security Advisory 2020-1998-01 - The gnutls packages provide the GNU Transport Layer Security library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS. An issue was addressed where the DTLS client hello contains a random value of all zeroes.