Stack-based buffer overflow in Linux kernel - CVE-2018-11506
Published: May 30, 2018 / Updated: May 31, 2018
Vulnerability identifier: #VU13070
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-11506
CWE-ID: CWE-121
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause DoS condition on the target system.
The vulnerability exists in the sr_do_ioctl function, as defined in the drivers/scsi/sr_ioctl.c source code file due to differing buffer sizes in the CDROM layer and the SCSI layer. A local attacker can submit specially crafted input, trigger a stack-based overflow and cause the system to crash.
Affected software
Linux kernel
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
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
How to mitigate CVE-2018-11506
Install update from vendor's website.
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a
kernel - addressed in versions 4.16.13-200.fc27, 4.16.13-300.fc28
kernel - addressed in versions 4.16.13-200.fc27, 4.16.13-300.fc28