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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: freebsd

Published: 2017-11-16T20:00:00Z

Updated: 2024-09-16T23:25:39.726Z

Reserved: 2016-11-30T00:00:00

Link: CVE-2017-1086

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2017-11-16T20:29:00.207

Modified: 2017-12-02T12:57:25.750

Link: CVE-2017-1086

cve-icon Redhat

No data.