CVE-2017-1000255
Power8 PowerPC Transactional Memory Stack Pointer Leak
Description
On Linux running on PowerPC hardware (Power8 or later) a user process can craft a signal frame and then do a sigreturn so that the kernel will take an exception (interrupt), and use the r1 value *from the signal frame* as the kernel stack pointer. As part of the exception entry the content of the signal frame is written to the kernel stack, allowing an attacker to overwrite arbitrary locations with arbitrary values. The exception handling does produce an oops, and a panic if panic_on_oops=1, but only after kernel memory has been over written. This flaw was introduced in commit: "5d176f751ee3 (powerpc: tm: Enable transactional memory (TM) lazily for userspace)" which was merged upstream into v4.9-rc1. Please note that kernels built with CONFIG_PPC_TRANSACTIONAL_MEM=n are not vulnerable.
INFO
Published Date :
Oct. 30, 2017, 8:29 p.m.
Last Modified :
April 11, 2018, 1:29 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-1000255.
| URL | Resource |
|---|---|
| http://www.securityfocus.com/bid/101264 | Third Party Advisory VDB Entry |
| https://access.redhat.com/errata/RHSA-2018:0654 | |
| https://access.redhat.com/security/cve/CVE-2017-1000255 | Issue Tracking Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-1000255 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-1000255 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 11, 2018
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2018:0654 [No Types Assigned] -
Initial Analysis by [email protected]
Nov. 22, 2017
Action Type Old Value New Value Added CVSS V2 (AV:L/AC:L/Au:N/C:N/I:C/A:C) Added CVSS V3 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Changed Reference Type http://www.securityfocus.com/bid/101264 No Types Assigned http://www.securityfocus.com/bid/101264 Third Party Advisory, VDB Entry Changed Reference Type https://access.redhat.com/security/cve/CVE-2017-1000255 No Types Assigned https://access.redhat.com/security/cve/CVE-2017-1000255 Issue Tracking, Third Party Advisory Added CWE CWE-787 Added CPE Configuration AND OR *cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:powerpc_power8:-:*:*:*:*:*:*:* cpe:2.3:h:ibm:powerpc_power9:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 01, 2017
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/101264 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-1000255 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-1000255
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.17796
percentile