A vulnerability was found in Red Hat Enterprise Linux 6.10 (Operating System). It has been rated as critical. Affected by this issue is some unknown functionality of the component Linux Kernel. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. CVE summarizes:

A flaw was found in the way the Linux kernel handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, processor does not deliver interrupts and exceptions, they are delivered once the first instruction after the stack switch is executed. An unprivileged system user could use this flaw to crash the system kernel resulting in DoS. This CVE-2018-10872 was assigned due to regression of CVE-2018-8897 in Red Hat Enterprise Linux 6.10 GA kernel. No other versions are affected by this CVE.

The bug was discovered 07/11/2018. The weakness was published 07/10/2018 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is handled as CVE-2018-10872 since 05/09/2018. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 111077 (CentOS 6 : kernel (CESA-2018:2164) (Spectre)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 256463 (CentOS Security Update for kernel (CESA-2018:2164)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published 3 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (111077). Similar entry is available at 117315.

Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux

Version

• 6.10

License

• commercial

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