Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2017-1000255 First vendor Publication 2017-10-30
Vendor Cve Last vendor Modification 2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Overall CVSS Score 5.5
Base Score 5.5 Environmental Score 5.5
impact SubScore 3.6 Temporal Score 5.5
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:N/I:C/A:C)
Cvss Base Score 6.6 Attack Range Local
Cvss Impact Score 9.2 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000255

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1

Nessus® Vulnerability Scanner

Date Description
2018-01-15 Name : The remote Fedora host is missing a security update.
File : fedora_2017-aa9927961f.nasl - Type : ACT_GATHER_INFO
2017-11-22 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3487-1.nasl - Type : ACT_GATHER_INFO
2017-11-21 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2017-925.nasl - Type : ACT_GATHER_INFO
2017-10-26 Name : The remote Fedora host is missing a security update.
File : fedora_2017-c110ac0eb1.nasl - Type : ACT_GATHER_INFO
2017-10-26 Name : The remote Fedora host is missing a security update.
File : fedora_2017-cafcdbdde5.nasl - Type : ACT_GATHER_INFO
2017-10-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3443-1.nasl - Type : ACT_GATHER_INFO
2017-10-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3443-2.nasl - Type : ACT_GATHER_INFO

Sources (Detail)

http://www.securityfocus.com/bid/101264
https://access.redhat.com/errata/RHSA-2018:0654
https://access.redhat.com/security/cve/CVE-2017-1000255
Source Url

Alert History

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Date Informations
2024-11-28 13:00:54
  • Multiple Updates
2020-05-23 00:54:28
  • Multiple Updates
2018-04-11 09:19:15
  • Multiple Updates
2017-11-23 13:23:48
  • Multiple Updates
2017-11-22 21:22:39
  • Multiple Updates
2017-11-22 13:23:46
  • Multiple Updates
2017-11-01 09:23:50
  • Multiple Updates
2017-10-31 00:23:11
  • First insertion