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In February 2024, a malicious backdoor was introduced to the Linux build of the xz utility within the liblzma library in versions 5.6.0 and 5.6.1 by an account using the name "Jia Tan". [ b ] [ 4 ] The backdoor gives an attacker who possesses a specific Ed448 private key remote code execution through OpenSSH on the affected Linux system.
On 29 March 2024, Andres Freund, a PostgreSQL developer working at Microsoft, announced that he had found a backdoor in XZ Utils, impacting versions 5.6.0 and 5.6.1. Compressed test files had been added to the code for setting up the backdoor via additions to the configure script in the tar files .
August: Ken Thompson publishes his seminal paper, "Reflections on Trusting Trust", in which he describes how he modified a C compiler so that when used to compile a specific version of the Unix operating system, it inserts a backdoor into the login command, and when used to compile a new copy of itself, it inserts the backdoor insertion code ...
A backdoor may take the form of a hidden part of a program, [7] a separate program (e.g. Back Orifice may subvert the system through a rootkit), code in the firmware of the hardware, [8] or parts of an operating system such as Windows. [9] [10] [11] Trojan horses can be used to create vulnerabilities in a device
A hardware backdoor is a backdoor implemented within the physical components of a computer system, also known as its hardware. They can be created by introducing malicious code to a component's firmware , or even during the manufacturing process of a integrated circuit , known as a hardware trojan .
Backdoor compared with the dominant (front door) in the chromatic circle: they share two tones and are transpositionally equivalent. In jazz and jazz harmony, the chord progression from iv 7 to ♭ VII 7 to I (the tonic or "home" chord) has been nicknamed the backdoor progression [1] [2] or the backdoor ii-V, as described by jazz theorist and author Jerry Coker.
BASHLITE is written in C, and designed to easily cross-compile to various computer architectures. [9]Exact capabilities differ between variants, but the most common features [9] generate several different types of DDoS attacks: it can hold open TCP connections, send a random string of junk characters to a TCP or a UDP port, or repeatedly send TCP packets with specified flags.
The small truncation was unusual compared to previous EC PRGs, which according to Matthew Green had only output 1/2 to 2/3 of the bits in the output function. [5] The low truncation was in 2006 shown by Gjøsteen to make the RNG predictable and therefore unusable as a CSPRNG, even if Q had not been chosen to contain a backdoor. [ 20 ]