What is the severity of CVE-2018-17155?

The severity of CVE-2018-17155 is classified as medium due to potential information disclosure.

How do I fix CVE-2018-17155?

To fix CVE-2018-17155, update FreeBSD to a version that is 11.2-STABLE(r338983) or later, 11.2-RELEASE-p5 or later, 11.1-RELEASE-p16 or later, or 10.4-RELEASE-p14 or later.

Which versions of FreeBSD are affected by CVE-2018-17155?

CVE-2018-17155 affects FreeBSD versions prior to 11.2-STABLE(r338983), 11.2-RELEASE-p4, 11.1-RELEASE-p15, and 10.4-RELEASE-p13.

Is CVE-2018-17155 easily exploitable?

Exploitation of CVE-2018-17155 requires local access to the affected system, making it less likely to be exploited remotely.

Vulnerability/
CVE-2018-17155

medium

5.5

CWE

200

28/9/2018

16/9/2024

CVE-2018-17155: Infoleak

Q: What does CVE-2018-17155 exploit?

CVE-2018-17155 exploits insufficient initialization of memory copied to userland in the getcontext and swapcontext system calls.

First published: Fri Sep 28 2018(Updated: )

In FreeBSD before 11.2-STABLE(r338983), 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-STABLE(r338984), and 10.4-RELEASE-p13, due to insufficient initialization of memory copied to userland in the getcontext and swapcontext system calls, small amounts of kernel memory may be disclosed to userland processes. Unprivileged authenticated local users may be able to access small amounts privileged kernel data.

Credit: secteam@freebsd.org

Affected Software	Affected Version	How to fix
FreeBSD Kernel	<11.2
FreeBSD Kernel	=10.4
FreeBSD Kernel	=10.4-p13
FreeBSD Kernel	=11.1-p15
FreeBSD Kernel	=11.2-p4

Remedy

https://security.FreeBSD.org/advisories/FreeBSD-EN-18:12.mem.asc

Never miss a vulnerability like this again

Reference Links

https://security.FreeBSD.org/advisories/FreeBSD-EN-18:12.mem.asc

Frequently Asked Questions

What is the severity of CVE-2018-17155?
The severity of CVE-2018-17155 is classified as medium due to potential information disclosure.
How do I fix CVE-2018-17155?
To fix CVE-2018-17155, update FreeBSD to a version that is 11.2-STABLE(r338983) or later, 11.2-RELEASE-p5 or later, 11.1-RELEASE-p16 or later, or 10.4-RELEASE-p14 or later.
Which versions of FreeBSD are affected by CVE-2018-17155?
CVE-2018-17155 affects FreeBSD versions prior to 11.2-STABLE(r338983), 11.2-RELEASE-p4, 11.1-RELEASE-p15, and 10.4-RELEASE-p13.
What does CVE-2018-17155 exploit?
CVE-2018-17155 exploits insufficient initialization of memory copied to userland in the getcontext and swapcontext system calls.
Is CVE-2018-17155 easily exploitable?
Exploitation of CVE-2018-17155 requires local access to the affected system, making it less likely to be exploited remotely.

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