Mehrere Probleme in Linux
ID: | USN-4752-1 |
Distribution: | Ubuntu |
Plattformen: | Ubuntu 20.04 LTS |
Datum: | Fr, 26. Februar 2021, 00:05 |
Referenzen: | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29371
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-35508 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10135 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29660 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25704 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29368 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29369 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27152 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25284 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15437 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24490 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28588 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15436 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25641 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14314 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25643 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28915 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29661 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25212 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27815 |
Applikationen: | Linux |
Originalnachricht |
|
--===============2394443451689008324== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="HbrDUOEqlDe4KvYA" Content-Disposition: inline --HbrDUOEqlDe4KvYA Content-Type: text/plain; charset=utf-8 Content-Disposition: inlin Content-Transfer-Encoding: quoted-printable ========================================================================== Ubuntu Security Notice USN-4752-1 February 25, 2021 linux-oem-5.6 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-oem-5.6: Linux kernel for OEM systems Details: Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. A physically proximate attacker could use this to impersonate a previously paired Bluetooth device. (CVE-2020-10135) Jay Shin discovered that the ext4 file system implementation in the Linux kernel did not properly handle directory access with broken indexing, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-14314) It was discovered that the block layer implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-15436) It was discovered that the serial port driver in the Linux kernel did not properly initialize a pointer in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2020-15437) Andy Nguyen discovered that the Bluetooth HCI event packet parser in the Linux kernel did not properly handle event advertisements of certain sizes, leading to a heap-based buffer overflow. A physically proximate remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-24490) It was discovered that the NFS client implementation in the Linux kernel did not properly perform bounds checking before copying security labels in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25212) It was discovered that the Rados block device (rbd) driver in the Linux kernel did not properly perform privilege checks for access to rbd devices in some situations. A local attacker could use this to map or unmap rbd block devices. (CVE-2020-25284) It was discovered that the block layer subsystem in the Linux kernel did not properly handle zero-length requests. A local attacker could use this to cause a denial of service. (CVE-2020-25641) It was discovered that the HDLC PPP implementation in the Linux kernel did not properly validate input in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25643) Kiyin (尹亮) discovered that the perf subsystem in the Linux kernel did not properly deallocate memory in some situations. A privileged attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2020-25704) It was discovered that the KVM hypervisor in the Linux kernel did not properly handle interrupts in certain situations. A local attacker in a guest VM could possibly use this to cause a denial of service (host system crash). (CVE-2020-27152) It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash). (CVE-2020-27815) It was discovered that an information leak existed in the syscall implementation in the Linux kernel on 32 bit systems. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28588) It was discovered that the framebuffer implementation in the Linux kernel did not properly perform range checks in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28915) Jann Horn discovered a race condition in the copy-on-write implementation in the Linux kernel when handling hugepages. A local attacker could use this to gain unintended write access to read-only memory pages. (CVE-2020-29368) Jann Horn discovered that the mmap implementation in the Linux kernel contained a race condition when handling munmap() operations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-29369) Jann Horn discovered that the romfs file system in the Linux kernel did not properly validate file system meta-data, leading to an out-of-bounds read. An attacker could use this to construct a malicious romfs image that, when mounted, exposed sensitive information (kernel memory). (CVE-2020-29371) Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-29660) Jann Horn discovered a race condition in the tty subsystem of the Linux kernel in the locking for the TIOCSPGRP ioctl(), 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-2020-29661) It was discovered that a race condition existed that caused the Linux kernel to not properly restrict exit signal delivery. A local attacker could possibly use this to send signals to arbitrary processes. (CVE-2020-35508) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.6.0-1048-oem 5.6.0-1048.52 linux-image-oem-20.04 5.6.0.1048.44 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/4752-1 CVE-2020-10135, CVE-2020-14314, CVE-2020-15436, CVE-2020-15437, CVE-2020-24490, CVE-2020-25212, CVE-2020-25284, CVE-2020-25641, CVE-2020-25643, CVE-2020-25704, CVE-2020-27152, CVE-2020-27815, CVE-2020-28588, CVE-2020-28915, CVE-2020-29368, CVE-2020-29369, CVE-2020-29371, CVE-2020-29660, CVE-2020-29661, CVE-2020-35508 Package Information: https://launchpad.net/ubuntu/+source/linux-oem-5.6/5.6.0-1048.52 --HbrDUOEqlDe4KvYA Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEpgY7tWAjCaQ8jrvULwmejQBegfQFAmA3U0YACgkQLwmejQBe gfQp7w//XpXLMirD8TiQMiLBmatcxIrg48H2YGI/C9y8xhQunBfSudbkeS7QWw+B 15DHvEd9uxzBhIF77gRHIlwTqfpxoWBtsHNgVkRkiSBLhNXRnaCsgmbFKoYXwJEs u48NK76pNgvrVI3SwR0cjAVX82mWzTy87PNbcke5hX6K1N/ePqEuThvv6bwx5sq2 j6gFUz5gmmaxLk+giY1BgJqES/WrVjDZWMUG6co8aGkRYPVFL2eJAsom9r1T27XP vhdwZkXv8ydMQh5LQkeuT8h86+3tpVdfgFPDc7XeoNUhLrXNGQS4ZkfVF1LBTmWw cCdgp6wORVLgkG4l45M+S/o/IM0LbqFW/zHwgcziBGslLJUPU/wcFPAIcU9yTzDP UzEymrFwTQjGAfQlGcsXGfgC06TVbCRxT+yNHmgUdDuskDnSEFA7XRAgav2Vz8+Q agGHPuM+6VwYLOmTGMVokeR/OFae4Urpghjmygt0/LnOuoje0MsriYw0y+Sk10VD GPFZPkDi1qBQQY1N0LWQdDDtaRg4gHqqa+3Zm3K1ePEXlYEWJP9EsYTWsKn4yeoJ pJSpxLQmhjPy02E19RqhGTR6/+cihnYF7LPpFV5IWOkPMJay/ID3fevg3piFfEj0 2lbVGpc7JCm8k4Wubh52iPCRfhb0CjMDLxtN8edBUvOZOVQwNtM= =RU3b -----END PGP SIGNATURE----- --HbrDUOEqlDe4KvYA-- --===============2394443451689008324== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline LS0gCnVidW50dS1zZWN1cml0eS1hbm5vdW5jZSBtYWlsaW5nIGxpc3QKdWJ1bnR1LXNlY3VyaXR5 LWFubm91bmNlQGxpc3RzLnVidW50dS5jb20KTW9kaWZ5IHNldHRpbmdzIG9yIHVuc3Vic2NyaWJl IGF0OiBodHRwczovL2xpc3RzLnVidW50dS5jb20vbWFpbG1hbi9saXN0aW5mby91YnVudHUtc2Vj dXJpdHktYW5ub3VuY2UK --===============2394443451689008324==-- |