CVE-2018-10840 Memory corruption in heap-based buffer overflow in fs/ext4/xattr.c
A heap-based buffer overflow in the Linux kernel ext4 filesystem allows attackers to execute arbitrary code or escalate privileges via a crafted image.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-10840?
CVE-2018-10840 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 16 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry() function. An attacker could exploit this by operating on a mounted crafted ext4 image.
Which versions are affected by CVE-2018-10840?
It affects 3 products.
Linux distribution packages (20)
kernel Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-abi-whitelists Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-alt Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-bootwrapper Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-debug Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-debug-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-debug-devel Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-debuginfo-common-ppc64le Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-devel Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-doc Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-headers Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-tools Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-tools-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-tools-libs Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
kernel-tools-libs-devel Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
perf Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
perf-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
python-perf Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
python-perf-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:4.14.0-115.5.1.el7a |
Products include Canonical Ubuntu Linux, Linux kernel, Redhat Enterprise Linux.
How do I fix CVE-2018-10840?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-10840 being exploited?
There is no known exploitation of CVE-2018-10840 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2018-10840, GHSA-mq9x-53x3-39h5, RHSA-2019:0162, UBUNTU-CVE-2018-10840.