Mehrere Probleme in Linux (Aktualisierung)
ID: | USN-4712-1 |
Distribution: | Ubuntu |
Plattformen: | Ubuntu 20.04 LTS, Ubuntu 20.10 |
Datum: | Do, 28. Januar 2021, 16:12 |
Referenzen: | Keine Angabe |
Applikationen: | Linux |
Update von: | Mehrere Probleme in Linux |
Originalnachricht |
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--===============3437866001207167993== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="w+MAdceOglSEzbpc" Content-Disposition: inline --w+MAdceOglSEzbpc Content-Type: text/plain; charset=us-ascii Content-Disposition: inline ========================================================================== Ubuntu Security Notice USN-4712-1 January 28, 2021 linux regression ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS Summary: USN-4576-1 introduced a regression in the Linux kernel. Software Description: - linux: Linux kernel Details: USN-4576-1 fixed a vulnerability in the overlay file system implementation in the Linux kernel. Unfortunately, that fix introduced a regression that could incorrectly deny access to overlay files in some situations. This update fixes the problem. We apologize for the inconvenience. Original vulnerability details: Giuseppe Scrivano discovered that the overlay file system in the Linux kernel did not properly perform permission checks in some situations. A local attacker could possibly use this to bypass intended restrictions and gain read access to restricted files. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: linux-image-5.8.0-41-generic 5.8.0-41.46 linux-image-5.8.0-41-generic-64k 5.8.0-41.46 linux-image-5.8.0-41-generic-lpae 5.8.0-41.46 linux-image-5.8.0-41-lowlatency 5.8.0-41.46 linux-image-generic 5.8.0.41.45 linux-image-generic-64k 5.8.0.41.45 linux-image-generic-lpae 5.8.0.41.45 linux-image-lowlatency 5.8.0.41.45 linux-image-oem-20.04 5.8.0.41.45 linux-image-virtual 5.8.0.41.45 Ubuntu 20.04 LTS: linux-image-5.4.0-65-generic 5.4.0-65.73 linux-image-5.4.0-65-generic-lpae 5.4.0-65.73 linux-image-5.4.0-65-lowlatency 5.4.0-65.73 linux-image-generic 5.4.0.65.68 linux-image-generic-lpae 5.4.0.65.68 linux-image-lowlatency 5.4.0.65.68 linux-image-oem 5.4.0.65.68 linux-image-oem-osp1 5.4.0.65.68 linux-image-virtual 5.4.0.65.68 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://usn.ubuntu.com/4712-1 https://bugs.launchpad.net/bugs/1900141, https://usn.ubuntu.com/usn/usn-4576-1 Package Information: https://launchpad.net/ubuntu/+source/linux/5.8.0-41.46 https://launchpad.net/ubuntu/+source/linux/5.4.0-65.73 --w+MAdceOglSEzbpc Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEpgY7tWAjCaQ8jrvULwmejQBegfQFAmASZJwACgkQLwmejQBe gfS+XA/+JW9I7IUVRspylXxi+lqXF8YPrP72uOf+RhTC5NYZxvytq6B3AfyxGTQt pl6rPGIw4c4sEEwpJHCkC3x0WyjPnAsHfG6rO8DlDT+cwI3vtBpn5/eYT18oc4Rm nj0UBXZbBccf8gcjIoGcT78gA/HnZEUgKuS9JQvWj2XulhsMhd7Z1/5SoN5HYvVP 82cHMQTMoXTBNlojbr8P7Z+iJM/v94FqTQq/FoOlKaIIlKKPMQ0xJ+FxtZAUoiLM NUnqNV+5NaOzicRyrS7KHiUkQfe0agUEmoBqXJEoLSqpekGQ9sWvN7Bg4UVKVjRf TO8tNhuNvqtcZGCBc+t+JOW3YKGZo7cRiRSNjrxTkKl15bIw8QdsI57POiMIpDBG DSwiilv/vMC8xPmnPpJ3gZSBPFWPu2Rju2GQRCDWIaoSooOqDXY8s1i0nGUQ5AfL WIGE5zHcqrH1LR08eCSwjVboyZu9p+tJ135OQJL8MCTwPNg4JGb5gcglw5foC++V 1vwTXOgYm1bWsxQExeC0PB3/vuLpueFxkkK57l0dfY8JzMyTA2YaNd9zW/gNlT5X BccUXUYCi72oP1gWkL30lvNl+ttOoVz9+P51ujMuyUQobK7x8GtbM+HFHEzl18PP L/FfmhkZw1zNcg9b6AnwC60DUjmOpNRhb1rsrATZfowpbbrKwI0= =zYCl -----END PGP SIGNATURE----- --w+MAdceOglSEzbpc-- --===============3437866001207167993== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline -- ubuntu-security-announce mailing list ubuntu-security-announce@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce |