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CVE-2019-11190

Status Candidate

Overview

The Linux kernel before 4.8 allows local users to bypass ASLR on setuid programs (such as /bin/su) because install_exec_creds() is called too late in load_elf_binary() in fs/binfmt_elf.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat.

Related Files

Ubuntu Security Notice USN-4008-3
Posted Jun 6, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4008-3 - USN-4008-1 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 ESM. Robert Swiecki discovered that the Linux kernel did not properly apply Address Space Layout Randomization in some situations for setuid elf binaries. A local attacker could use this to improve the chances of exploiting an existing vulnerability in a setuid elf binary. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-11190, CVE-2019-11191, CVE-2019-11810, CVE-2019-11815
MD5 | db49ff8f595ab9c220359728c2fce6de
Ubuntu Security Notice USN-4008-2
Posted Jun 5, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4008-2 - USN-4008-1 fixed multiple security issues in the Linux kernel. This update provides the corresponding changes to AppArmor policy for correctly operating under the Linux kernel with fixes for CVE-2019-11190. Without these changes, some profile transitions may be unintentionally denied due to missing mmap rules. Various other issues were also addressed.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2019-11190, CVE-2019-11191, CVE-2019-11810, CVE-2019-11815
MD5 | c8882ea2860369fb404f12edb2a0d011
Ubuntu Security Notice USN-4008-1
Posted Jun 5, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4008-1 - Robert Swiecki discovered that the Linux kernel did not properly apply Address Space Layout Randomization in some situations for setuid elf binaries. A local attacker could use this to improve the chances of exploiting an existing vulnerability in a setuid elf binary. It was discovered that a null pointer dereference vulnerability existed in the LSI Logic MegaRAID driver 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
systems | linux, ubuntu
advisories | CVE-2019-11190, CVE-2019-11191, CVE-2019-11810, CVE-2019-11815
MD5 | d990ef004d827d7c662f4a3b15d04b52
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