zero-day

Definitions

1. 1

   Of warez, released less than a day after the official product release.

   • Back then, having "zero day warez" (brand new cracked games that are not even one day old yet) on your BBS first was a big status symbol.
2. 2

   Of a vulnerability, newly discovered, and therefore still not fixed and possibly…

   Of a vulnerability, newly discovered, and therefore still not fixed and possibly exploited by hackers or other criminals.

   • Although it's had tons of publicity, the IE zero-day vulnerability is so far only a real threat to people running IE6 on Windows XP, and you have to wonder about the competence of the companies actually affected by it[.]
   • Zero-day flaws are a burgeoning commercial field in the underground hacker economy where some gangs work to order for commercial or government clients which want to break into systems.
   • The company says Mythos has revealed thousands of so-called zero-day—previously undiscovered—cyber vulnerabilities in every operating system and web browser, some of them up to 27 years old.
3. 3

   Of an exploit or its threat or an attack, benefiting from a newly found and yet unpatched…

   Of an exploit or its threat or an attack, benefiting from a newly found and yet unpatched or unmitigated flaw in software or hardware; using a zero-day vulnerability.

   • If your software is popular and has a high demand, you will want to defend against the "zero-day" cracker.
   • 2005, Valdes et al, Recent Advances in Intrusion Detection Automatically creating reliable signatures of zero-day exploits is the focus of intense research efforts.
   • Before discussing ways to counter zero-day attacks, let's begin with the definition of what a zero-day attack is. A zero-day attack is one that the vendor does not yet know about or hasn't been fixed.
4. ›+ 3 more definitionsshow fewer

   1. 4

      Used other than figuratively or idiomatically

      Used other than figuratively or idiomatically: see zero, day.

      • Average residues of 1.44 and 2.18 mg/kg chlortetracycline were seen in liver and kidney, respectively, at zero-day withdrawal.
   2. 5

      A vulnerability that has been discovered recently, and is yet unpatched or unmitigated

      A vulnerability that has been discovered recently, and is yet unpatched or unmitigated; a zero-day vulnerability.

      • New Internet Explorer zero-day exploited in Hong Kong attacks
      • Plus: Cisco discloses a zero-day with no available patch, Venezuela accuses the US of a cyberattack, and more.
   3. 6

      A day without obligations, where one does not worry about being productive.

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