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CVE-2018-7755

Status Candidate

Overview

An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

Related Files

Red Hat Security Advisory 2019-2043-01
Posted Aug 6, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2043-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include buffer overflow, denial of service, information leakage, null pointer, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-10853, CVE-2018-13053, CVE-2018-13093, CVE-2018-13094, CVE-2018-13095, CVE-2018-14625, CVE-2018-14734, CVE-2018-15594, CVE-2018-16658, CVE-2018-16885, CVE-2018-18281, CVE-2018-7755, CVE-2018-8087, CVE-2018-9363, CVE-2018-9516, CVE-2018-9517, CVE-2019-11599, CVE-2019-11810, CVE-2019-11833, CVE-2019-3459, CVE-2019-3460, CVE-2019-3882, CVE-2019-3900, CVE-2019-5489, CVE-2019-7222
SHA-256 | e071d742d6603367cb65da2c4efe950228d4321aa8233e8b9ddce2ca45118e06
Red Hat Security Advisory 2019-2029-01
Posted Aug 6, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2029-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, denial of service, information leakage, null pointer, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-10853, CVE-2018-13053, CVE-2018-13093, CVE-2018-13094, CVE-2018-13095, CVE-2018-14625, CVE-2018-14734, CVE-2018-15594, CVE-2018-16658, CVE-2018-16885, CVE-2018-18281, CVE-2018-7755, CVE-2018-8087, CVE-2018-9363, CVE-2018-9516, CVE-2018-9517, CVE-2019-11599, CVE-2019-11810, CVE-2019-11833, CVE-2019-3459, CVE-2019-3460, CVE-2019-3882, CVE-2019-3900, CVE-2019-5489, CVE-2019-7222
SHA-256 | bac8beb8ce1ab8e43186837924865c4859c9dd53f0986287f9d903fc550005c1
Debian Security Advisory 4308-1
Posted Oct 2, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4308-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2018-10902, CVE-2018-10938, CVE-2018-13099, CVE-2018-14609, CVE-2018-14617, CVE-2018-14633, CVE-2018-14678, CVE-2018-14734, CVE-2018-15572, CVE-2018-15594, CVE-2018-16276, CVE-2018-16658, CVE-2018-17182, CVE-2018-6554, CVE-2018-6555, CVE-2018-7755, CVE-2018-9363, CVE-2018-9516
SHA-256 | a9488a1ec49d402caeb675f06f2c3bfc5c6485d76c3af54ee57d369cf63de403
Ubuntu Security Notice USN-3718-2
Posted Jul 23, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3718-2 - USN-3695-2 fixed vulnerabilities in the Linux Hardware Enablement Kernel kernel for Ubuntu 16.04 LTS. Unfortunately, the fix for CVE-2018-1108 introduced a regression where insufficient early entropy prevented services from starting, leading in some situations to a failure to boot, This update addresses the issue. Various other issues were also addressed.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-1094, CVE-2018-10940, CVE-2018-1095, CVE-2018-1108, CVE-2018-11508, CVE-2018-7755
SHA-256 | 7352a11c02a1bd3ca1dde166137417760b084a8e80b91bc68a912cda66fc39c8
Ubuntu Security Notice USN-3718-1
Posted Jul 23, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3718-1 - USN-3695-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. Unfortunately, the fix for CVE-2018-1108 introduced a regression where insufficient early entropy prevented services from starting, leading in some situations to a failure to boot, This update addresses the issue. Various other issues were also addressed.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-1094, CVE-2018-10940, CVE-2018-1095, CVE-2018-1108, CVE-2018-11508, CVE-2018-7755
SHA-256 | 8b5aff682a7fe0dc91801054a3fa777ee05cd873429b047eb282b97fc691e598
Kernel Live Patch Security Notice LSN-0040-1
Posted Jul 5, 2018
Authored by Benjamin M. Romer

Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly handle corrupted meta data in some situations. An attacker could use this to specially craft an ext4 file system that caused a denial of service (system crash) when mounted. It was discovered that an information leak vulnerability existed in the floppy driver in the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux
advisories | CVE-2018-1092, CVE-2018-1093, CVE-2018-3665, CVE-2018-7755
SHA-256 | d714af351ebe0661ff777dd209b5eddccb3e9cea04d0ba77486507fcb340f6d4
Ubuntu Security Notice USN-3698-2
Posted Jul 3, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3698-2 - USN-3698-1 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 LTS for Ubuntu 12.04 ESM. It was discovered that the nested KVM implementation in the Linux kernel in some situations did not properly prevent second level guests from reading and writing the hardware CR8 register. A local attacker in a guest could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-12154, CVE-2017-12193, CVE-2017-15265, CVE-2018-1130, CVE-2018-3665, CVE-2018-5750, CVE-2018-5803, CVE-2018-6927, CVE-2018-7755, CVE-2018-7757
SHA-256 | 3a1e12e3782c7d4798f3d9810f6fccc5915c7ad2dec33af797f2a9aa81fb5037
Ubuntu Security Notice USN-3697-2
Posted Jul 3, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3697-2 - It was discovered that a null pointer dereference vulnerability existed in the DCCP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service. Jann Horn discovered that the 32 bit adjtimex syscall implementation for 64 bit Linux kernels did not properly initialize memory returned to user space in some situations. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2018-1130, CVE-2018-11508, CVE-2018-5750, CVE-2018-5803, CVE-2018-6927, CVE-2018-7755, CVE-2018-7757
SHA-256 | c9a9b6f9415eee0a015beb8e44d16a31b4242d4134fa1daff8f7c2ac1adc0f9d
Ubuntu Security Notice USN-3696-2
Posted Jul 3, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3696-2 - USN-3696-1 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 an integer overflow existed in the perf subsystem of the Linux kernel. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-13695, CVE-2017-18255, CVE-2017-18257, CVE-2018-1000204, CVE-2018-10021, CVE-2018-10087, CVE-2018-10124, CVE-2018-3665, CVE-2018-5814, CVE-2018-7755
SHA-256 | c590b91b523cf11805ff800ce0110af67ef149ddc9b9fa08c47b5de15cde5da4
Ubuntu Security Notice USN-3697-1
Posted Jul 3, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3697-1 - It was discovered that a null pointer dereference vulnerability existed in the DCCP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service. Jann Horn discovered that the 32 bit adjtimex syscall implementation for 64 bit Linux kernels did not properly initialize memory returned to user space in some situations. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2018-1130, CVE-2018-11508, CVE-2018-5750, CVE-2018-5803, CVE-2018-6927, CVE-2018-7755, CVE-2018-7757
SHA-256 | 55c8f38eb3a5a5b9ca0719a8cf82aed6fd3c1159902999681470b031b1f5489b
Ubuntu Security Notice USN-3698-1
Posted Jul 2, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3698-1 - It was discovered that the nested KVM implementation in the Linux kernel in some situations did not properly prevent second level guests from reading and writing the hardware CR8 register. A local attacker in a guest could use this to cause a denial of service. Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array implementation in the Linux kernel sometimes did not properly handle adding a new entry. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-12154, CVE-2017-12193, CVE-2017-15265, CVE-2018-1130, CVE-2018-3665, CVE-2018-5750, CVE-2018-5803, CVE-2018-6927, CVE-2018-7755, CVE-2018-7757
SHA-256 | 7da0a1087ba0d19f5b16753982535d7adcdc67fada9d245a7c967312fca4844c
Ubuntu Security Notice USN-3696-1
Posted Jul 2, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3696-1 - It was discovered that an integer overflow existed in the perf subsystem of the Linux kernel. A local attacker could use this to cause a denial of service. Wei Fang discovered an integer overflow in the F2FS filesystem implementation in the Linux kernel. A local attacker could use this to cause a denial of service. It was discovered that an information leak existed in the generic SCSI driver in the Linux kernel. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-13695, CVE-2017-18255, CVE-2017-18257, CVE-2018-1000204, CVE-2018-10021, CVE-2018-10087, CVE-2018-10124, CVE-2018-3665, CVE-2018-5814, CVE-2018-7755
SHA-256 | 8512d94bba9cbe7f7683bbee28a609dffc96c7e19622258f64608dca591ae0ec
Ubuntu Security Notice USN-3695-1
Posted Jul 2, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3695-1 - 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. It was discovered that the cdrom driver in the Linux kernel contained an incorrect bounds check. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-1094, CVE-2018-10940, CVE-2018-1095, CVE-2018-11508, CVE-2018-7755
SHA-256 | 8027dac45fca8f547843ef43e09760d5bbb95bb1ee7469c2947cce1a51b7622f
Ubuntu Security Notice USN-3695-2
Posted Jul 2, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3695-2 - USN-3695-1 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-1094, CVE-2018-10940, CVE-2018-1095, CVE-2018-11508, CVE-2018-7755
SHA-256 | 702548617b260a8caa37ca81a615acaf101fb1759be6eb65f217617fd0740351
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