CVE-2017-1086

Description

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p4, 11.0-RELEASE-p15, 10.4-STABLE, 10.4-RELEASE-p3, and 10.3-RELEASE-p24, not all information in the struct ptrace_lwpinfo is relevant for the state of any thread, and the kernel does not fill the irrelevant bytes or short strings. Since the structure filled by the kernel is allocated on the kernel stack and copied to userspace, a leak of information of the kernel stack of the thread is possible from the debugger. As a result, some bytes from the kernel stack of the thread using ptrace (PT_LWPINFO) call can be observed in userspace.

Category

3.3
CVSS
Severity: Low
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.07%
Vendor Advisory freebsd.org
Affected: FreeBSD FreeBSD
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1039809 vdb entry third party advisory
http://www.securityfocus.com/bid/101861 vdb entry third party advisory
https://www.freebsd.org/security/advisories/FreeBSD-SA-17:08.ptrace.asc vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-1086?
CVE-2017-1086 has been scored as a low severity vulnerability.
How to fix CVE-2017-1086?
To fix CVE-2017-1086, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-1086 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-1086 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-1086?
CVE-2017-1086 affects FreeBSD FreeBSD.
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