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CVE-2019-9213

Status Candidate

Overview

In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task.

Related Files

Reliable Datagram Sockets (RDS) rds_atomic_free_op Privilege Escalation
Posted Jan 22, 2020
Authored by Brendan Coles, Jann Horn, Mohamed Ghannam, nstarke, wbowling | Site metasploit.com

This Metasploit module attempts to gain root privileges on Linux systems by abusing a NULL pointer dereference in the rds_atomic_free_op function in the Reliable Datagram Sockets (RDS) kernel module (rds.ko). Successful exploitation requires the RDS kernel module to be loaded. If the RDS module is not blacklisted (default); then it will be loaded automatically. This exploit supports 64-bit Ubuntu Linux systems, including distributions based on Ubuntu, such as Linux Mint and Zorin OS. This exploit does not bypass SMAP. Bypasses for SMEP and KASLR are included. Failed exploitation may crash the kernel. This module has been tested successfully on various 4.4 and 4.8 kernels.

tags | exploit, kernel, root
systems | linux, ubuntu
advisories | CVE-2018-5333, CVE-2019-9213
SHA-256 | 561f5de542c8d58118095440168a640aad5069622602f1d8eac2d963687098c9
Red Hat Security Advisory 2019-1480-01
Posted Jun 18, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-1480-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include denial of service and null pointer vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-11477, CVE-2019-11478, CVE-2019-11479, CVE-2019-9213
SHA-256 | c97e7d7b7daed86df070782d936f28a68af605c9244804de5e179400e81ca993
Red Hat Security Advisory 2019-1479-01
Posted Jun 17, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-1479-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include denial of service and null pointer vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-11477, CVE-2019-11478, CVE-2019-11479, CVE-2019-9213
SHA-256 | 97113cfbe30fbceebe6aa05a8dc231cec04e7b0aa68aa9598e713c3f798a8800
Red Hat Security Advisory 2019-0831-01
Posted Apr 23, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-0831-01 - The kernel-alt packages provide the Linux kernel version 4.x. Issues addressed include bypass, denial of service, null pointer, and use-after-free vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-13053, CVE-2018-13094, CVE-2018-14734, CVE-2018-17972, CVE-2018-18281, CVE-2018-18386, CVE-2018-18397, CVE-2019-9213
SHA-256 | 56ec339fc2da9ed44f9d103367a73097824980f319bfbd006adc8ae2256618d5
Ubuntu Security Notice USN-3933-2
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3933-2 - USN-3933-1 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 an information leak vulnerability existed in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could possibly expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-1000410, CVE-2017-18360, CVE-2018-19824, CVE-2019-3460, CVE-2019-6974, CVE-2019-7222, CVE-2019-9213
SHA-256 | 293ab65e73bf98d20f314b55630ebb7d784a521cd0ca32fe2129f80d23b2e3ac
Ubuntu Security Notice USN-3933-1
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3933-1 - It was discovered that an information leak vulnerability existed in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could possibly expose sensitive information. It was discovered that the USB serial device driver in the Linux kernel did not properly validate baud rate settings when debugging is enabled. 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-2017-1000410, CVE-2017-18360, CVE-2018-19824, CVE-2019-3460, CVE-2019-6974, CVE-2019-7222, CVE-2019-9213
SHA-256 | dacdaa1df1a65a7d64811fadba0688d21342dc6a545f4369b2f3a0d1e7628320
Ubuntu Security Notice USN-3932-2
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3932-2 - USN-3932-1 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 a race condition existed in the f2fs file system implementation in 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, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-18249, CVE-2018-14610, CVE-2018-14612, CVE-2018-14613, CVE-2018-14614, CVE-2018-14616, CVE-2018-16884, CVE-2018-9517, CVE-2019-3459, CVE-2019-3701, CVE-2019-3819, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-9213
SHA-256 | 6b04b1ca2b939f9ef77c26b11ce5669d6f7a229ddfbabf646e284686af89d8a3
Ubuntu Security Notice USN-3932-1
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3932-1 - It was discovered that a race condition existed in the f2fs file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service. Wen Xu discovered that the f2fs file system implementation in the Linux kernel did not properly validate metadata. An attacker could use this to construct a malicious f2fs image that, when mounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-18249, CVE-2018-14610, CVE-2018-14612, CVE-2018-14613, CVE-2018-14614, CVE-2018-14616, CVE-2018-16884, CVE-2018-9517, CVE-2019-3459, CVE-2019-3701, CVE-2019-3819, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-9213
SHA-256 | 8a9cf057269e567e457b41d6710b7b91e84287f5f6e3ab62365a668b68242bbc
Ubuntu Security Notice USN-3931-2
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3931-2 - USN-3931-1 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 and for the Linux Azure kernel for Ubuntu 14.04 LTS. M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-14678, CVE-2018-18021, CVE-2018-19824, CVE-2019-3460, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912, CVE-2019-8980, CVE-2019-9213
SHA-256 | 3da25881795c75e4bb949d560d025be98c843cd588e2826360ca5c71e4e66c69
Ubuntu Security Notice USN-3931-1
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3931-1 - M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service. It was discovered that the KVM implementation in the Linux kernel on ARM 64bit processors did not properly handle some ioctls. An attacker with the privilege to create KVM-based virtual machines could use this to cause a denial of service or execute arbitrary code in the host. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2018-14678, CVE-2018-18021, CVE-2018-19824, CVE-2019-3460, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912, CVE-2019-8980, CVE-2019-9213
SHA-256 | 8648907b306a30de1b668a41a8ae79574d61f4eeddb6db9b310b4966103ace78
Ubuntu Security Notice USN-3930-2
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3930-2 - USN-3930-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS. Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture subsystem. A physically proximate attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-19824, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912, CVE-2019-8956, CVE-2019-8980, CVE-2019-9003, CVE-2019-9162, CVE-2019-9213
SHA-256 | 4102f0cd3e3625cbe62726a696226a0b078386a4844fe7aa1d3769f8d3be7544
Ubuntu Security Notice USN-3930-1
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3930-1 - Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture subsystem. A physically proximate attacker could use this to cause a denial of service. Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information leak in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2018-19824, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912, CVE-2019-8956, CVE-2019-8980, CVE-2019-9003, CVE-2019-9162, CVE-2019-9213
SHA-256 | 368e9dbf141a9e760054a79a440120646f0b3026e48ac5716619c4793e2820ff
Linux Virtual Address 0 Mappable Via Privilege write()
Posted Mar 6, 2019
Authored by Jann Horn, Google Security Research

It was discovered that virtual address 0 is mappable via privileged write() to /proc/*/mem on Linux.

tags | exploit
systems | linux
advisories | CVE-2019-9213
SHA-256 | 304236f8a1050e3e16648cbdbb32b50ffb3020bab9e3c600151f688ea0e19fe3
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