Vulnerability Details : CVE-2017-1086
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.
Vulnerability category: Information leak
Products affected by CVE-2017-1086
- cpe:2.3:o:freebsd:freebsd:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-1086
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 18 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-1086
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:P/I:N/A:N |
3.9
|
2.9
|
NIST | |
|
3.3
|
LOW | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
1.8
|
1.4
|
NIST |
CWE ids for CVE-2017-1086
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-1086
-
http://www.securitytracker.com/id/1039809
FreeBSD ptrace(2) Initialization Error Lets Local Users View Portions of System Memory on the Target System - SecurityTrackerThird Party Advisory;VDB Entry
-
http://www.securityfocus.com/bid/101861
FreeBSD CVE-2017-1086 Local Information Disclosure VulnerabilityThird Party Advisory;VDB Entry
-
https://www.freebsd.org/security/advisories/FreeBSD-SA-17:08.ptrace.asc
Vendor Advisory
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