This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============6600405249505223978== Content-Language: en-US Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------4NBbFF8M0w7R6l0LQqMelXwy"
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------4NBbFF8M0w7R6l0LQqMelXwy Content-Type: multipart/mixed; boundary="------------wm0TZTdT4nHj2y3LMuDXIp8g"; protected-headers="v1" From: Rodrigo Figueiredo Zaiden <rodrigo.zaiden@canonical.com> Reply-To: security@ubuntu.com To: ubuntu-security-announce@lists.ubuntu.com Message-ID: <96a4ff8a-69fd-440a-907e-4f8b43012f43@canonical.com> Subject: [USN-6700-1] Linux kernel vulnerabilities
--------------wm0TZTdT4nHj2y3LMuDXIp8g Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64
========================================================================== Ubuntu Security Notice USN-6700-1 March 18, 2024
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS (Available with Ubuntu Pro) - Ubuntu 14.04 LTS (Available with Ubuntu Pro)
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: - linux: Linux kernel - linux-kvm: Linux kernel for cloud environments - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
Details:
It was discovered that the Layer 2 Tunneling Protocol (L2TP) implementation in the Linux kernel contained a race condition when releasing PPPoL2TP sockets in certain conditions, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-20567)
It was discovered that the ext4 file system implementation in the Linux kernel did not properly handle block device modification while it is mounted. A privileged attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-34256)
Eric Dumazet discovered that the netfilter subsystem in the Linux kernel did not properly handle DCCP conntrack buffers in certain situations, leading to an out-of-bounds read vulnerability. An attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2023-39197)
It was discovered that a race condition existed in the AppleTalk networking subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-51781)
It was discovered that the ext4 file system implementation in the Linux kernel did not properly handle the remount operation in certain cases, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2024-0775)
Notselwyn discovered that the netfilter subsystem in the Linux kernel did not properly handle verdict parameters in certain cases, leading to a use- after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2024-1086)
It was discovered that a race condition existed in the SCSI Emulex LightPulse Fibre Channel driver in the Linux kernel when unregistering FCF and re-scanning an HBA FCF table, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2024-24855)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 LTS (Available with Ubuntu Pro): linux-image-4.4.0-1130-kvm 4.4.0-1130.140 linux-image-4.4.0-252-generic 4.4.0-252.286 linux-image-4.4.0-252-lowlatency 4.4.0-252.286 linux-image-generic 4.4.0.252.258 linux-image-generic-lts-xenial 4.4.0.252.258 linux-image-kvm 4.4.0.1130.127 linux-image-lowlatency 4.4.0.252.258 linux-image-lowlatency-lts-xenial 4.4.0.252.258 linux-image-virtual 4.4.0.252.258 linux-image-virtual-lts-xenial 4.4.0.252.258
Ubuntu 14.04 LTS (Available with Ubuntu Pro): linux-image-4.4.0-1129-aws 4.4.0-1129.135 linux-image-4.4.0-252-generic 4.4.0-252.286~14.04.1 linux-image-4.4.0-252-lowlatency 4.4.0-252.286~14.04.1 linux-image-aws 4.4.0.1129.126 linux-image-generic-lts-xenial 4.4.0.252.219 linux-image-lowlatency-lts-xenial 4.4.0.252.219 linux-image-virtual-lts-xenial 4.4.0.252.219
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-6700-1 CVE-2022-20567, CVE-2023-34256, CVE-2023-39197, CVE-2023-51781, CVE-2024-0775, CVE-2024-1086, CVE-2024-24855
--------------wm0TZTdT4nHj2y3LMuDXIp8g--
--------------4NBbFF8M0w7R6l0LQqMelXwy Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc"
-----BEGIN PGP SIGNATURE-----
wsB5BAABCAAjFiEEYrygdx1GDec9TV8EZ0GeRcM5nt0FAmX42QwFAwAAAAAACgkQZ0GeRcM5nt0o LAf/eK2Sg1pHs0DTun+rVPSsoOBDMRcOclAx4MDgeEXSwAdJ6kMyNWb1qdT26RqYi05yV5h52xfQ qwx+0O1oWQrlTBvbaA1whLxc3YfB9gz6hdC9atzsKMPMCjomhS8KaK60LxqKTU7X/d+gyYSu6QK8 tgDzFKZPW9GFpwA86pPz42wfT2UJb73mt1/DfosbwxXRbjpY9M1ow+dpUqVbDZs0oru5YAFac6kq FThaD9F5p7NbgY3sII9ElRL+FoVnwJ/TwgrxNrfoe4pz0wf7oMy86zB3fn/lCSsviOTuN9aNaMSd DHXZOTs75x2v1WYtsqU9jnIXZtAFi0Zlm+1cLTE0zw== =bgFB -----END PGP SIGNATURE-----
--------------4NBbFF8M0w7R6l0LQqMelXwy--
--===============6600405249505223978== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline
Cg==
--===============6600405249505223978==--
|