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CVE-2017-1000253

Status Candidate

Overview

Linux distributions that have not patched their long-term kernels with https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (committed on April 14, 2015). This kernel vulnerability was fixed in April 2015 by commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (backported to Linux 3.10.77 in May 2015), but it was not recognized as a security threat. With CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE enabled, and a normal top-down address allocation strategy, load_elf_binary() will attempt to map a PIE binary into an address range immediately below mm->mmap_base. Unfortunately, load_elf_ binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are that is supposed to be the "gap" between the stack and the binary.

Related Files

Linux Local Privilege Escalation
Posted Sep 28, 2017
Authored by Qualys Security Advisory

A Linux PIE/stack corruption vulnerability exists. Most notably, all versions of CentOS 7 before 1708 (released on September 13, 2017), all versions of Red Hat Enterprise Linux 7 before 7.4 (released on August 1, 2017), and all versions of CentOS 6 and Red Hat Enterprise Linux 6 are exploitable.

tags | advisory
systems | linux, redhat, centos
advisories | CVE-2017-1000253
SHA-256 | e629fc1437f3afd0ad4608b004f8c31a78825d7d031176a742308b19fc02b46d
Red Hat Security Advisory 2017-2795-01
Posted Sep 27, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2795-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | 934a940dab30a592a02e07455e3094183299356243b334ef95ac79e84914895a
Red Hat Security Advisory 2017-2802-01
Posted Sep 27, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2802-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | bfd0689a6c80bfdd023af7ba1544e909bd3742cffc39037e70d4907f9e378ac9
Red Hat Security Advisory 2017-2801-01
Posted Sep 27, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2801-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | ba1c030ec21e814f6a1cd612c57efcdf9cf2e048e865ea5156413a3da7884c5f
Red Hat Security Advisory 2017-2796-01
Posted Sep 27, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2796-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | 866324fca23747f69de4e8ef9551dad894b102df8aa49be3b5d059c922eb20dd
Red Hat Security Advisory 2017-2793-01
Posted Sep 27, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2793-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | c9fff4891a8921a1d680380df8587c02a6e20f76f5ee7eea18c9a1ddbd6e67be
Red Hat Security Advisory 2017-2794-01
Posted Sep 27, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2794-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | 68ea50ab00f02a7b3ff4323f4ecd7472a907b5657bfbe53369a53538c4b95c33
Red Hat Security Advisory 2017-2797-01
Posted Sep 27, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2797-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | f02373e421ca9abcaa1761c1507fde90dcd1950ddf0498eae02ed610189b206f
Red Hat Security Advisory 2017-2798-01
Posted Sep 27, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2798-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | 40f9f08efc1c1976c5e55dfb0092643a2f5f1f194edeff4cc6addf135da1cbdd
Red Hat Security Advisory 2017-2800-01
Posted Sep 26, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2800-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | d8a9d0afd413fd3cff47b4b91f265b4ff434e1f1031486cfd195ab8aa5e4cf4d
Red Hat Security Advisory 2017-2799-01
Posted Sep 26, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2799-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable, the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID PIE binary could use this flaw to escalate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000253
SHA-256 | 6e410605a90e5ae5dac226f1c1596223ce521c47926efe91a44e62dae507a90f
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