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FreeBSD Security Advisory - FreeBSD-SA-18:09.l1tf
Posted Aug 15, 2018
Site security.freebsd.org

FreeBSD Security Advisory - On certain Intel 64-bit x86 systems there is a period of time during terminal fault handling where the CPU may use speculative execution to try to load data. The CPU may speculatively access the level 1 data cache (L1D). Data which would otherwise be protected may then be determined by using side channel methods. This issue affects bhyve on FreeBSD/amd64 systems. An attacker executing user code, or kernel code inside of a virtual machine, may be able to read secret data from the kernel or from another virtual machine.

tags | advisory, x86, kernel
systems | freebsd, bsd
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | d2d8d94bd9c95b68c83e957598d1c85c
Ubuntu Security Notice USN-3742-2
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3742-2 - 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 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. A local attacker in a guest virtual machine could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-18344, CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391
MD5 | 8765eb216afec68e03e4729f603e2423
Ubuntu Security Notice USN-3741-2
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3741-2 - USN-3741-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. 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. A local attacker in a guest virtual machine could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391
MD5 | a0d39dbb79e2f19019b21e3f47cfbcee
Ubuntu Security Notice USN-3740-2
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3740-2 - USN-3740-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. 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. A local attacker in a guest virtual machine could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-3620, CVE-2018-3646, CVE-2018-5391
MD5 | af22cc41875cbf38e938fba21964205a
Red Hat Security Advisory 2018-2391-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2391-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a speculative execution vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-10901, CVE-2018-3620, CVE-2018-3646
MD5 | 31aae57342942241eb7b2e83ce29304c
Red Hat Security Advisory 2018-2389-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2389-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a speculative execution vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | ab4b463ebe68414fc69f4d7af6ab178e
Red Hat Security Advisory 2018-2395-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2395-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include bypass, denial of service, and use-after-free vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2017-13215, CVE-2018-10675, CVE-2018-3620, CVE-2018-3646, CVE-2018-3693, CVE-2018-5390, CVE-2018-7566
MD5 | dd0004dd825e5ff2095aeec5aa67d5fb
Red Hat Security Advisory 2018-2393-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2393-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a speculative execution vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-10901, CVE-2018-3620, CVE-2018-3646
MD5 | 0b29098d005550cb432bb9d434c83770
Red Hat Security Advisory 2018-2394-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2394-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a bypass vulnerability.

tags | advisory, kernel, bypass
systems | linux, redhat
advisories | CVE-2018-10901, CVE-2018-3620, CVE-2018-3639, CVE-2018-3646
MD5 | 14f3c60bc7297b2894f63fd0687edb78
Red Hat Security Advisory 2018-2392-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2392-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a speculative execution vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-10901, CVE-2018-3620, CVE-2018-3646
MD5 | c49e27a6063c8a556a0f690a8c04fffb
Red Hat Security Advisory 2018-2396-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2396-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a bypass vulnerability.

tags | advisory, kernel, bypass
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3639, CVE-2018-3646
MD5 | 5e3403f4ef9ef7eb50906783ec76098a
Red Hat Security Advisory 2018-2387-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2387-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a bypass vulnerability.

tags | advisory, kernel, bypass
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3639, CVE-2018-3646
MD5 | 59108e2a3b8f624b8c7e278e385a1d36
Red Hat Security Advisory 2018-2388-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2388-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a speculative execution vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | e3988b6aca9768729655e1de6971d0f2
Red Hat Security Advisory 2018-2384-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2384-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include bypass, denial of service, and use-after-free vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2017-13215, CVE-2018-10675, CVE-2018-3620, CVE-2018-3646, CVE-2018-3693, CVE-2018-5390, CVE-2018-7566
MD5 | dced325f9f28c5902430e74c00b89b10
Red Hat Security Advisory 2018-2390-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2390-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include bypass, denial of service, and use-after-free vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2017-0861, CVE-2017-15265, CVE-2018-1000004, CVE-2018-10901, CVE-2018-3620, CVE-2018-3646, CVE-2018-3693, CVE-2018-7566
MD5 | f607a3b41764ef32fcaa2cc5d8d10a54
Debian Security Advisory 4272-1
Posted Aug 14, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4272-1 - Juha-Matti Tilli discovered a flaw in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker can take advantage of this flaw to trigger time and calculation expensive fragment reassembly algorithms by sending specially crafted packets, leading to remote denial of service. This is mitigated by reducing the default limits on memory usage for incomplete fragmented packets.

tags | advisory, remote, denial of service, kernel
systems | linux, debian
advisories | CVE-2018-5391
MD5 | 7c5e38c47c610c412e385893c4194f02
Kernel Live Patch Security Notice LSN-0042-1
Posted Aug 14, 2018
Authored by Benjamin M. Romer

On August 14, fixes for CVE-2018-3620 and CVE-2018-3646 were released into the Ubuntu Xenial and Bionic kernels. These CVEs are security vulnerabilities caused by flaws in the design of speculative execution hardware in the computer's CPU. Researchers discovered that memory present in the L1 data cache of an Intel CPU core may be visible to other processes running on the same core.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | dfbdb00734352df26fe57ac4d26bfeac
Kernel Live Patch Security Notice LSN-0041-1
Posted Aug 10, 2018
Authored by Benjamin M. Romer

The sr_do_ioctl function in drivers/scsi/sr_ioctl.c in the Linux kernel through 4.16.12 allows local users to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact because sense buffers have different sizes at the CDROM layer and the SCSI layer, as demonstrated by a CDROMREADMODE2 ioctl call. Wen Xu discovered that the ext4 file system implementation in the Linux kernel did not properly initialize the crc32c checksum driver. A local attacker could use this to cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux
advisories | CVE-2018-1094, CVE-2018-11506, CVE-2018-13094, CVE-2018-13405, CVE-2018-5390
MD5 | fc944208680854f3168be2702b530c3b
Linux Kernel 4.14.7 (Ubuntu 16.04 / CentOS 7) Arbitrary File Read
Posted Aug 9, 2018
Authored by Andrey Konovalov

Linux Kernel version 4.14.7 (Ubuntu 16.04 / CentOS 7) arbitrary file read exploit with KASLR and SMEP bypass.

tags | exploit, arbitrary, kernel
systems | linux, ubuntu, centos
advisories | CVE-2017-18344
MD5 | 3979f56d7a233c067dd58ea0b8242822
Ubuntu Security Notice USN-3732-2
Posted Aug 7, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3732-2 - USN-3732-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, tcp, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-5390
MD5 | 802eb3abdd14bdadb5da2e1595870840
Debian Security Advisory 4266-1
Posted Aug 7, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4266-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation or denial of service.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2018-13405, CVE-2018-5390
MD5 | fd149235f5f3d7399795b4610222711d
Ubuntu Security Notice USN-3732-1
Posted Aug 7, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3732-1 - 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.

tags | advisory, remote, denial of service, kernel, tcp
systems | linux, ubuntu
advisories | CVE-2018-5390
MD5 | 43c84ca28d83281850c44600f89423ee
Red Hat Security Advisory 2018-2309-01
Posted Aug 3, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2309-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a bypass vulnerability.

tags | advisory, kernel, bypass
systems | linux, redhat
advisories | CVE-2018-3639
MD5 | 1e0323f0367612bfb37718139c812ea0
Linux Kernel UDP Fragmentation Offset (UFO) Privilege Escalation
Posted Aug 3, 2018
Authored by h00die, Brendan Coles, Andrey Konovalov | Site metasploit.com

This Metasploit module attempts to gain root privileges on Linux systems by abusing UDP Fragmentation Offload (UFO). This exploit targets only systems using Ubuntu (Trusty / Xenial) kernels 4.4.0-21 <= 4.4.0-89 and 4.8.0-34 <= 4.8.0-58, including Linux distros based on Ubuntu, such as Linux Mint. The target system must have unprivileged user namespaces enabled and SMAP disabled. Bypasses for SMEP and KASLR are included. Failed exploitation may crash the kernel. This Metasploit module has been tested successfully on various Ubuntu and Linux Mint systems, including: Ubuntu 14.04.5 4.4.0-31-generic x64 Desktop; Ubuntu 16.04 4.8.0-53-generic; Linux Mint 17.3 4.4.0-89-generic; Linux Mint 18 4.8.0-58-generic

tags | exploit, kernel, root, udp
systems | linux, ubuntu
advisories | CVE-2017-1000112
MD5 | 365cc8e31e8378f416a359810066fcda
Sun Solaris 11.3 AVS Local Kernel Root
Posted Aug 2, 2018
Authored by mu-b

Sun Solaris versions 10 and 11.3 and below local kernel root exploit.

tags | exploit, kernel, local, root
systems | solaris
advisories | CVE-2018-2892
MD5 | e87115e82276d32408f82a68e1b2de6f
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