Memory corruption in Linux kernel - CVE-2018-11412
Published: May 30, 2018 / Updated: May 31, 2018
Vulnerability identifier: #VU13071
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-11412
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to gain elevated privileges or cause DoS condition on the target system.
The vulnerability exists due to improper memory operations performed by the ext4_read_inline_data() function, as defined in the fs/ext4/inline.c source code file. A local attacker can mount a customized ext4 filesystem that stores the system.data extended attribute value in a dedicated inode, supply malicious input containing an untrusted length value, trigger memory corruption and gain elevated privileges or cause a DoS condition.
Affected software
Linux kernel
Amazon Linux AMI
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Fedora
kernel-alt (Red Hat package)
kernel
kernel-tools
Amazon Linux AMI
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Fedora
kernel-alt (Red Hat package)
kernel
kernel-tools
How to mitigate CVE-2018-11412
Install update from vendor's website.
kernel-alt (Red Hat package) - update to 4.14.0-115.6.1.el7a
kernel - update to 4.17.2-200.fc28
kernel-tools - update to 4.17.2-200.fc28
kernel - update to 4.17.2-200.fc28
kernel-tools - update to 4.17.2-200.fc28