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Acid3 rendered by Internet Explorer 8.0 (before the September 2011 update of the Acid3 test). 20/100, test failed. The Acid3 test result on Safari 3 (above, failure) and Safari 4 (below, success) After the Acid3 test page is completely rendered, the letter 'A' in the word "Acid3" can be clicked to see an alert (or shift-click for a new window ...
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 capabilities on the affected Linux system.
Hardware backdoors are backdoors in hardware, such as code inside hardware or firmware of computer chips. [1] The backdoors may be directly implemented as hardware Trojans in the integrated circuit. Hardware backdoors are intended to undermine security in smartcards and other cryptoprocessors unless investment is made in anti-backdoor design ...
On its own, an arbitrary code execution exploit will give the attacker the same privileges as the target process that is vulnerable. [11] For example, if exploiting a flaw in a web browser, an attacker could act as the user, performing actions such as modifying personal computer files or accessing banking information, but would not be able to perform system-level actions (unless the user in ...
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 .
[7] [8] It does not evaluate a browser's conformance to other web standards, such as Cascading Style Sheets, ECMAScript, or the Document Object Model. Conformance testing for those standards is within the purview of Acid3, an automated test published by Ian Hickson in 2008. [9] Similarly, Acid3 does not evaluate a browser's HTML5 conformance.
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.
In the concrete execution, line 2 sets z to 2, and the test in line 3 fails since 1 ≠ 100000. Concurrently, the symbolic execution follows the same path but treats x and y as symbolic variables. It sets z to the expression 2 y and notes that, because the test in line 3 failed, x ≠ 100000.