drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Linux
Name: |
Mehrere Probleme in Linux |
|
ID: |
USN-3742-2 |
|
Distribution: |
Ubuntu |
|
Plattformen: |
Ubuntu 12.04 ESM |
|
Datum: |
Mi, 15. August 2018, 07:40 |
|
Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3646
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18344
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5390
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5391
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3620 |
|
Applikationen: |
Linux |
|
Originalnachricht |
--===============2912209842377684976== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="Kc9HNjpzOXVc7FFU" Content-Disposition: inline
--Kc9HNjpzOXVc7FFU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline
========================================================================== Ubuntu Security Notice USN-3742-2 August 14, 2018
linux-lts-trusty vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM
Details:
USN-3742-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 for Ubuntu 12.04 ESM.
It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local attacker in a guest virtual machine could use this to expose sensitive information (memory from other guests or the host OS). (CVE-2018-3646)
It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local attacker could use this to expose sensitive information (memory from the kernel or other processes). (CVE-2018-3620)
Andrey Konovalov discovered an out-of-bounds read in the POSIX timers subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2017-18344)
Juha-Matti Tilli discovered that the TCP implementation in the Linux kernel performed algorithmically expensive operations in some situations when handling incoming packets. A remote attacker could use this to cause a denial of service. (CVE-2018-5390)
Juha-Matti Tilli discovered that the IP implementation in the Linux kernel performed algorithmically expensive operations in some situations when handling incoming packet fragments. A remote attacker could use this to cause a denial of service. (CVE-2018-5391)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 12.04 ESM: linux-image-3.13.0-155-generic 3.13.0-155.206~precise1 linux-image-3.13.0-155-generic-lpae 3.13.0-155.206~precise1 linux-image-generic-lpae-lts-trusty 3.13.0.155.145 linux-image-generic-lts-trusty 3.13.0.155.145
Please note that the recommended mitigation for CVE-2018-3646 involves updating processor microcode in addition to updating the kernel; however, the kernel includes a fallback for processors that have not received microcode updates.
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/usn/usn-3742-2 https://usn.ubuntu.com/usn/usn-3742-1 CVE-2017-18344, CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/L1TF
--Kc9HNjpzOXVc7FFU Content-Type: application/pgp-signature; name="signature.asc"
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEpgY7tWAjCaQ8jrvULwmejQBegfQFAltzWO0ACgkQLwmejQBe gfQc8BAArAg8NYKG7Nl/ms7pZ0k/yZeATtWtnIAz1GO5gdD5anhw+1uLfCs5u2ST lt4ZBT5BsCASyfwnbSb/RkjUcsDknIHlo0T9CiWcTT5pUBL27Y9t6r2tMU0WoyCD 31dcvJuxNw4u1jS+3fkVsDxbdIp1sg49E8KIA9V7tAcOhwU4e4JUYwMBsuD6ltr7 W4m1x879Cw4jZVw3wWO4+9imksELfn8mBKM4f5T1RUEnxx63QWi88M3+A91UEoz4 Nph+J24rRY8EPWInU2CvXHgB+li9IF+kvdPv/qgp0mtkhUywLq7z/nXszEVFSp7s o02Wufzj9DqEbonFzGvHAG/AcuU9QK3c9/CfXMTpZ5qD2sA5lN9jH7EQ/nz2Fiv4 T8/l4Y9hCuGEpPZ+tEARdJTTZJOxW4559X7B4jk6XV7jUP5sCLb5Mg/kt7q/JZtd g3lA3MX8P+jXkdx575yYgTObjMu+KbCJuxpbBATe/Y0XpafMP6ei+uBrPdcGmFOQ WxoBAu9QBHSV4yP14xe1HCTuFYsFZazZaLXQN7WMKoUL/4XeZv9lx89lMoYZlG5y TV81FBK0ZQdDOvkk2v7MQdnAg64EI/1IrlA5KuylvwKtxqq6fYebxOkpjQ800Y9E lr6+puDQWsA5jys1npUAqboS/mRr+f9fECrhEjztugfHyrrBV9Y= =0O7Y -----END PGP SIGNATURE-----
--Kc9HNjpzOXVc7FFU--
--===============2912209842377684976== 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
|
|
|
|