Category: Linux

Kali GPG Error the repository is not signed

Kali GPG Error

On April 28th Kali announced the rolling of a new signing key for the Kali repository. As a result, any existing installation will fail with the error GPG Error, the repository is not signed, when trying to update the repositories using the sudo apt update command:

Err:1 http://kali.download/kali kali-rolling InRelease
The following signatures couldn't be verified because the public key is not
available: NO_PUBKEY ED65462EC8D5E4C5
Warning: GPG error: http://kali.download/kali kali-rolling InRelease: The fol
lowing signatures couldn't be verified because the public key is not availabl
e: NO_PUBKEY ED65462EC8D5E4C5
Error: The repository 'http://http.kali.org/kali kali-rolling InRelease' is n
ot signed.
Notice: Updating from such a repository can't be done securely, and is theref
ore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configurat
ion details.
Notice: Repository 'Kali Linux' changed its 'firmware component' value from
non-free' to 'non-free-firmware'
Notice: More information about this can be found online at: https://ww.kali.
org/blog/non-free-firmware-transition/

As stated on the official blog, to fix this issue, the new key should be manually installed using the following command:

sudo wget https://archive.kali.org/archive-keyring.gpg -O /usr/share/keyrings/kali-archive-keyring.gpg

This is the only required action. After that, sudo apt update will function as it did before.

Kali updating repositories

Custom MAC Address Linux Service

MAC Addresses are unique for each Network Interface Controller (NIC) and most often are not configurable. Taking advantage of this fact in combination with the Organizationally Unique Identifier(OUI), many Network scanners use the MAC Address in order to determine the manufacturer of a Network Device or even the device type. As you can read in RFC 7042:

48-bit MAC "addresses" are the most commonly used Ethernet interface identifiers. Those that are globally unique are also called EUI-48 identifiers. An EUI-48 is structured into an initial 3-octet OUI and an additional 3 octets assigned by the OUI holder or into a larger initial prefix assigned to an organization and a shorter sequence of additional bits so as to add up to 48 bits in total.

Here you can find a complete list of the registered OUIs from IEEE and here the Wireshark OUI Lookup tool.

Continue reading Custom MAC Address Linux Service