Comment on Critical Unauthenticated RCE Flaws in CUPS Printing Systems

• mox@lemmy.sdf.org ⁨2⁩ ⁨months⁩ ago

  That refers to the fact that printer advertisements can contain lies: Although you might see a familiar printer name appear on a network, it might secretly point to the address of a malicious device.

  So my first advice stands: Avoid interaction with untrusted or potentially compromised print servers.

  To be clear, when I say “interaction”, I don’t just mean printing to them. I mean any interaction at all. Even just browsing a network for printers could potentially mean your system contacts the devices at the advertised addresses, and receives data from them. This Qualys report doesn’t make clear whether this kind of interaction is safe, so I have to assume for now that it is not.

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  • lemmyvore@feddit.nl ⁨2⁩ ⁨months⁩ ago

    How do you avoid interaction if it’s being done automatically by your machine when you open up a print dialog, and if malicious servers can use the same names as legit printers?

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    • mox@lemmy.sdf.org ⁨2⁩ ⁨months⁩ ago

      I suppose I would avoid connecting to untrusted networks, or avoid opening print dialogs while on them, or uninstall CUPS until a fix is available.

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      • superkret@feddit.org ⁨2⁩ ⁨months⁩ ago

        Just a heads-up: A fix is available. I got an update to libcups-filters last night.

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