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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.2716 Security updates for linux kernel 12 September 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Root Compromise -- Existing Account Denial of Service -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-13406 CVE-2018-13405 CVE-2018-12233 CVE-2018-11506 CVE-2018-11412 Reference: ESB-2018.2056 ESB-2018.2515.3 Original Bulletin: https://lists.ubuntu.com/archives/ubuntu-security-announce/2018-September/004573.html - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Kernel Live Patch Security Notice 0043-1 September 11, 2018 linux vulnerability ========================================================================== A security issue affects these releases of Ubuntu: | Series | Base kernel | Arch | flavors | |------------------+--------------+----------+------------------| | Ubuntu 14.04 LTS | 4.4.0 | amd64 | generic | | Ubuntu 14.04 LTS | 4.4.0 | amd64 | lowlatency | | Ubuntu 16.04 LTS | 4.15.0 | amd64 | generic | | Ubuntu 16.04 LTS | 4.15.0 | amd64 | lowlatency | | Ubuntu 18.04 LTS | 4.15.0 | amd64 | generic | | Ubuntu 18.04 LTS | 4.15.0 | amd64 | lowlatency | Summary: Several security issues were fixed in the kernel. Software Description: - - linux: Linux kernel Details: Piotr Gabriel Kosinski and Daniel Shapira discovered a stack-based buffer overflow in the CDROM driver implementation of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-11506) Jann Horn discovered that the ext4 filesystem implementation in the Linux kernel did not properly keep xattr information consistent in some situations. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-11412) Silvio Cesare discovered that the generic VESA frame buffer driver in the Linux kernel contained an integer overflow. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-13406) It was discovered that the Linux kernel did not properly handle setgid file creation when performed by a non-member of the group. A local attacker could use this to gain elevated privileges. (CVE-2018-13405) Shankara Pailoor discovered that the JFS filesystem implementation in the Linux kernel contained a buffer overflow when handling extended attributes. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-12233) Update instructions: The problem can be corrected by updating your livepatches to the following versions: | Kernel | Version | flavors | |--------------------------+----------+--------------------------| | 4.4.0-133.159 | 43.1 | generic, lowlatency | | 4.4.0-133.159~14.04.1 | 43.1 | lowlatency, generic | | 4.15.0-32.35 | 43.1 | lowlatency, generic | | 4.15.0-32.35~16.04.1 | 43.4 | generic, lowlatency | References: CVE-2018-11506, CVE-2018-11412, CVE-2018-13406, CVE-2018-13405, CVE-2018-12233 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBW5infWaOgq3Tt24GAQj0sg/+MCEOj1XIsKciuM1dzFvK/2arTFP3Y0KP VIwl28rVyJqnyr+MHDuO+4GH6yv7sYN0D5TBfdmdLjVpe37ddfY+Hf5+PdvxodBO MQwmERxJmQb1Vdm0T6gwCmRogupBf7vwHM+VMo9dkzNk80sEpkOjhHPZywDZzLvu okfdNY+9DOMxaL2S2kKwwp+x5VO+84YuODCkoskn6BfKeUrV1jngHoEGzM6xvGcc PUdECYEtYqCBD59xw956FBykW45V4I2ji9druT+aa1Kz+3cvHdXOaoExN187KoLY Pi2pQz7Vgd1oILutuIumCyCfgebQQZDb9FhQxVDUYVSp+v2w38CprF1IWXC0LncZ BHfoWgXVrXKbVm5Pjacd9II3XkjqBShCd9RYNrJwJ4akq2Y8oZWddKSvVvFIMTW/ sRMiSNiT1zrFBEywEeo26Xm68eO+PgGGUozY1i59RZgiCstXUmNldBYq1c7+kgQy 8lC0iHRqG2uIq1CRhkzN6lKVjL7NjyuxEpRVC/h47o+vg6NVE9vw6gOWpoTesort A70azV7+nWuBr457OR1mEFF2onG20roaQk72blICaMTf12KdZ7YhYFVA37PsgGU/ AS+DDiYU8bp+kO3gbN2WO8lhiayA6wkpDqUlSp24eyGGdUBr5wxp8O3s5V30eSwR vsc07GCWLys= =H3Vc -----END PGP SIGNATURE-----