Root-Rechte für Angreifer

[FrankM]

Die Tage ging ja wieder eine Meldung durchs Netz, die einige zum Teil recht gefährliche Lücken im Kernel benannte.

https://www.heise.de/news/Luecken-im-Linux-Kernel-erlauben-lokale-Rechteausweitung-8992648.html

Die darin benannten CVE's wurden heute vom Debian Team gefixt.

Package        : linux
CVE ID         : CVE-2023-0386 CVE-2023-31436 CVE-2023-32233

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.

CVE-2023-0386

    It was discovered that under certain conditions the overlayfs
    filesystem implementation did not properly handle copy up
    operations. A local user permitted to mount overlay mounts in user
    namespaces can take advantage of this flaw for local privilege
    escalation.

CVE-2023-31436

    Gwangun Jung reported a a flaw causing heap out-of-bounds read/write
    errors in the traffic control subsystem for the Quick Fair Queueing
    scheduler (QFQ) which may result in information leak, denial of
    service or privilege escalation.

CVE-2023-32233

    Patryk Sondej and Piotr Krysiuk discovered a use-after-free flaw in
    the Netfilter nf_tables implementation when processing batch
    requests, which may result in local privilege escalation for a user
    with the CAP_NET_ADMIN capability in any user or network namespace.

For the stable distribution (bullseye), these problems have been fixed in
version 5.10.179-1.

We recommend that you upgrade your linux packages.

Da kann ich mich nur der Empfehlung des Debian Teams anschließen, mal schnell die Server aktualisieren!