Linux Kernel alarm_timer_nsleep() Function Integer Overflow Vulnerability [CVE-2018-13053]
CVE Number – CVE-2018-13053
A vulnerability in the alarm_timer_nsleep() function of the Linux Kernel could allow a local attacker to trigger an integer overflow condition on a targeted system.
The vulnerability exists in the alarm_timer_nsleep() function, as defined in the kernel/time/alarmtimer.c source code file of the affected software, and is due to an integer overflow condition that could occur via a large relative timeout when the ktime_add_safe() function is not used. An attacker could exploit this vulnerability by executing a program or file that submits malicious input to the targeted system. A successful exploit could be used to conduct further attacks.
Kernel.org confirmed the vulnerability and released a software patch.
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To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor critical systems.
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Kernel.org released a bug report at the following link: bug 200303
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Kernel.org released a patch at the following link: tip-5f936e19cc0ef97dbe3a56e9498922ad5ba1edef.tar.gz
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.