--===============1303427535083329666== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="9Hr1PRyblpAcvvUh" Content-Disposition: inline
--9Hr1PRyblpAcvvUh Content-Type: text/plain; charset=us-ascii Content-Disposition: inline
========================================================================== Ubuntu Security Notice USN-5092-2 September 29, 2021
linux-hwe-5.11, linux-azure, linux-azure-5.11, linux-oracle-5.11 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.04 - Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-signed-azure: Signed kernel image azure - linux-azure-5.11: Linux kernel for Microsoft Azure cloud systems - linux-hwe-5.11: Linux hardware enablement (HWE) kernel - linux-oracle-5.11: Linux kernel for Oracle Cloud systems
Details:
Valentina Palmiotti discovered that the io_uring subsystem in the Linux kernel could be coerced to free adjacent memory. A local attacker could use this to execute arbitrary code. (CVE-2021-41073)
Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. (CVE-2021-33624)
Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculatively Store Bypass (SSB) side- channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-34556)
Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculatively Store Bypass (SSB) side-channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-35477)
It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)
It was discovered that the Option USB High Speed Mobile device driver in the Linux kernel did not properly handle error conditions. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-37159)
Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576)
It was discovered that the Virtio console implementation in the Linux kernel did not properly validate input lengths in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-38160)
Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly order connection setup operations. An attacker controlling a remote NFS server could use this to cause a denial of service on the client. (CVE-2021-38199)
It was discovered that the Sun RPC implementation in the Linux kernel contained an out-of-bounds access error. A remote attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-38201)
It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2021-38204)
It was discovered that the Xilinx 10/100 Ethernet Lite device driver in the Linux kernel could report pointer addresses in some situations. An attacker could use this information to ease the exploitation of another vulnerability. (CVE-2021-38205)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.04: linux-image-5.11.0-1017-azure 5.11.0-1017.18 linux-image-azure 5.11.0.1017.18
Ubuntu 20.04 LTS: linux-image-5.11.0-1017-azure 5.11.0-1017.18~20.04.1 linux-image-5.11.0-1019-oracle 5.11.0-1019.20~20.04.1 linux-image-5.11.0-37-generic 5.11.0-37.41~20.04.2 linux-image-5.11.0-37-generic-64k 5.11.0-37.41~20.04.2 linux-image-5.11.0-37-generic-lpae 5.11.0-37.41~20.04.2 linux-image-5.11.0-37-lowlatency 5.11.0-37.41~20.04.2 linux-image-azure-edge 5.11.0.1017.18~20.04.16 linux-image-generic-64k-hwe-20.04 5.11.0.37.41~20.04.16 linux-image-generic-hwe-20.04 5.11.0.37.41~20.04.16 linux-image-generic-lpae-hwe-20.04 5.11.0.37.41~20.04.16 linux-image-lowlatency-hwe-20.04 5.11.0.37.41~20.04.16 linux-image-oracle 5.11.0.1019.20~20.04.12 linux-image-virtual-hwe-20.04 5.11.0.37.41~20.04.16
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://ubuntu.com/security/notices/USN-5092-2 https://ubuntu.com/security/notices/USN-5092-1 CVE-2021-33624, CVE-2021-34556, CVE-2021-35477, CVE-2021-3679, CVE-2021-37159, CVE-2021-37576, CVE-2021-38160, CVE-2021-38199, CVE-2021-38201, CVE-2021-38204, CVE-2021-38205, CVE-2021-41073
Package Information: https://launchpad.net/ubuntu/+source/linux-azure/5.11.0-1017.18 https://launchpad.net/ubuntu/+source/linux-signed-azure/5.11.0-1017.18 https://launchpad.net/ubuntu/+source/linux-azure-5.11/5.11.0-1017.18~20.04.1 https://launchpad.net/ubuntu/+source/linux-hwe-5.11/5.11.0-37.41~20.04.2 https://launchpad.net/ubuntu/+source/linux-oracle-5.11/5.11.0-1019.20~20.04.1
--9Hr1PRyblpAcvvUh Content-Type: application/pgp-signature; name="signature.asc"
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEBAJL1M8q+hI0VIn8jRkUtPPTt5UFAmFUKDQACgkQjRkUtPPT t5WpUg/+Lf2Ild83jyMJCpYnPQ44iud4HZMr4mAQn0cxCYlpR7ltKJL3aMTYyeBj sA5Z+BeC80ZC9HyXE5js9W4r7ByB+t/JYdpQjev/smGlU8AmZ9XVDwJ5TE90s127 /EuKWa6Dq9/9UdVGXZo4g/CqwKhDXbwFmyGoEWSwmIwjHoL+gO2b18XO33OwZMCI 2WI74Mx2jYzxJ8WzzXN9Xe/O4Q/rvdCbQUJDeMcRDO/myFtp+h7RZyaieMqoIq5D uvqdmTIcWSEPyLfzSUk+w3DToMCrr1YE4sgrh/WM1ZCjusqX3aJOG55/pQrV8RMC trcdnQGTB/3XRDFi7uLngXgNBkjL10vLRjQHSTD/bllpA+t0rpU+Iv7D8dbaufPf B0q5syzi/vU+kQ9wNtweOrOEnsQwjc5P40i7jE0K1JwH5Wi62P7F8PIxXstb+Ez0 XsTJlU1webhqmKcUQqo5+AgUJS5ayuTqtECdy07xPTou15w/AlofhNuySPOwErLt w2G9QZE6zEAK20Thpjs/6NKx3VElaUoQXu0nj6GzCX98RPs/wyT3kPx/WzmX4S71 aUklcw8lld00g3O0pcJnEsK/PDDhdgUjpeC7Iqk8kfiZgsvIy/HGem/tjW33t5iZ 52tcU+75OgRqrIPaX/LaecuWHgkqd/5VHLZRvAOgadMghwXJEoY= =4lLs -----END PGP SIGNATURE-----
--9Hr1PRyblpAcvvUh--
--===============1303427535083329666== 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
|