Zwei Probleme in Linux
ID: | USN-3549-1 |
Distribution: | Ubuntu |
Plattformen: | Ubuntu 16.04 LTS |
Datum: | Mo, 29. Januar 2018, 22:27 |
Referenzen: | http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5753
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715 |
Applikationen: | Linux |
Originalnachricht |
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--===============0583068113920315603== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="3vuihtlyhfihyhx5" Content-Disposition: inline --3vuihtlyhfihyhx5 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline ========================================================================== Ubuntu Security Notice USN-3549-1 January 29, 2018 linux-kvm vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-kvm: Linux kernel for cloud environments Details: Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2017-5715, CVE-2017-5753) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.4.0-1017-kvm 4.4.0-1017.22 linux-image-kvm 4.4.0.1017.16 Please note that fully mitigating CVE-2017-5715 (Spectre Variant 2) requires corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates. On i386 and amd64 architectures, the IBRS and IBPB features are required to enable the kernel mitigations. Ubuntu is working with Intel and AMD to provide future microcode updates that implement IBRS and IBPB as they are made available. Ubuntu users with a processor from a different vendor should contact the vendor to identify necessary firmware updates. Ubuntu will provide corresponding QEMU updates in the future for users of self-hosted virtual environments in coordination with upstream QEMU. Ubuntu users in cloud environments should contact the cloud provider to confirm that the hypervisor has been updated to expose the new CPU features to virtual machines. After a standard system update you need to reboot your computer to apply the necessary changes. References: https://www.ubuntu.com/usn/usn-3549-1 https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAndMeltdown CVE-2017-5715, CVE-2017-5753 Package Information: https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1017.22 --3vuihtlyhfihyhx5 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIcBAABCgAGBQJab2ziAAoJEC8Jno0AXoH0ssoP/jmj79TXbHU1PZRb11Vc1I41 Kl/GplMgfVB1YcCDj6304Ceq+FLSrJGrQDLsko89JyXSQ3dqzKRtY2iY55YNeOEz nombs3tGsGl4L39CVUFHabr3sWCjFbcDEmfUL6aX+S0wY+KJNyRxNtjoeWFuE45x TD8cvDrHUCr1usE8Qneopkyc0/cyRkuJhwcUhzkc23nOpWAeKV935O9QOAjNj3Ho fSmmD5CSFFZLMpjIersZpynZzasFNLpzi2bAz7gaHoqrJyLfYEkEXUvR8sIKZJfE w0pLlFw3JvkPIJsKXun2G5XfJjtACBBZ5gARIyZeIiizaraKeAVg6vuAtpMi1jCL H0hjGZJ7gaBirivr0YCC88KqAKJjx3s8uy9dbFJZaeJOpaA3vMaTOY9fvJliKex3 FyKNNzHLfvl0BsIzAMaLpZlf2in/yoFZQMmglGoK2Uvff9QqDIcZrdX22zrA3gFx +M4NA5u8Y1cmHjS3C3ZizPKXirO55jUz74i6+B+rufQiaJtuS+QUNEHgXGBsrZqN UBMVH1YtovhvZoR2+3TplOCB+Btz3KOKWob0/r+YhCHxu6hVFP3ShDUpenQf0xTU GNoZlE3zzSq2W5fLiqJMuzKws5CQl02U1XXye8jZpzH+nLx5TOnN1gtELmACvsKX CZ3hZvsNCi+7R/Xlr8lb =IYId -----END PGP SIGNATURE----- --3vuihtlyhfihyhx5-- --===============0583068113920315603== 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 |