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Oracle Linux: CVE-2017-1000363: ELSA-2017-3636: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2017-1000363: ELSA-2017-3636: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:C)
Published
05/22/2017
Created
07/25/2018
Added
07/27/2017
Modified
07/22/2024

Description

Linux drivers/char/lp.c Out-of-Bounds Write. Due to a missing bounds check, and the fact that parport_ptr integer is static, a 'secure boot' kernel command line adversary (can happen due to bootloader vulns, e.g. Google Nexus 6's CVE-2016-10277, where due to a vulnerability the adversary has partial control over the command line) can overflow the parport_nr array in the following code, by appending many (>LP_NO) 'lp=none' arguments to the command line. A vulnerability was found in the Linux kernel's lp_setup() function where it doesn't apply any bounds checking when passing "lp=none". This can result into overflow of the parport_nr[] array. An attacker with control over kernel command line can overwrite kernel code and data with fixed (0xff) values.

Solution(s)

  • oracle-linux-upgrade-kernel-uek

References

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