7.4
HIGH
CVE-2016-6516
Linux Kernel Ioctl Double Fetch Race Condition Vulnerability
Description

Race condition in the ioctl_file_dedupe_range function in fs/ioctl.c in the Linux kernel through 4.7 allows local users to cause a denial of service (heap-based buffer overflow) or possibly gain privileges by changing a certain count value, aka a "double fetch" vulnerability.

INFO

Published Date :

Aug. 6, 2016, 8:59 p.m.

Last Modified :

Nov. 21, 2024, 2:56 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.4
Public PoC/Exploit Available at Github

CVE-2016-6516 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2016-6516 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
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-2016-6516.

URL Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20 Patch
http://www.openwall.com/lists/oss-security/2016/07/31/6 Release Notes
http://www.securityfocus.com/bid/92259
https://bugzilla.redhat.com/show_bug.cgi?id=1362457 Issue Tracking Third Party Advisory VDB Entry
https://github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20 Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20 Patch
http://www.openwall.com/lists/oss-security/2016/07/31/6 Release Notes
http://www.securityfocus.com/bid/92259
https://bugzilla.redhat.com/show_bug.cgi?id=1362457 Issue Tracking Third Party Advisory VDB Entry
https://github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20 Patch

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).

Profile Photo
oneoy/cve-

None

C Perl 6 Perl ASP HTML Rich Text Format Visual Basic TeX Assembly Shell

Updated: 3 months, 2 weeks ago
1 stars 1 fork 1 watcher
Born at : June 13, 2019, 1:51 p.m. This repo has been linked 308 different CVEs too.
Profile Photo
wpengfei/CVE-2016-6516-exploit

An demonstration of how to exploit double-fetch vulnerability CVE-2016-6516

C

Updated: 2 years, 5 months ago
8 stars 2 fork 2 watcher
Born at : Dec. 7, 2017, 1:55 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
thdusdl1219/CVE-Study

None

Python

Updated: 3 weeks, 5 days ago
10 stars 1 fork 1 watcher
Born at : Aug. 30, 2017, 2:37 p.m. This repo has been linked 1269 different CVEs too.
Profile Photo
mudongliang/LinuxFlaw

The vm images in this repo are lost, we recommend our new project: https://github.com/hust-open-atom-club/S2VulnHub

linux vulnerability reproduction cve edb

Shell C Perl PHP TeX Python Assembly Makefile HTML XSLT

Updated: 1 week ago
328 stars 71 fork 71 watcher
Born at : July 30, 2015, 10:36 a.m. This repo has been linked 309 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-6516 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2016-6516 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]

    Nov. 28, 2016

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/92259 [No Types Assigned]
  • Modified Analysis by [email protected]

    Aug. 10, 2016

    Action Type Old Value New Value
    Added CPE Configuration Configuration 1 OR *cpe:2.3:o:linux:linux_kernel:4.7:*:*:*:*:*:*:* (and previous)
    Added CVSS V2 (AV:L/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3 AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20 No Types Assigned https://github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20 Patch
    Changed Reference Type http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20 No Types Assigned http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20 Patch
    Changed Reference Type http://www.openwall.com/lists/oss-security/2016/07/31/6 No Types Assigned http://www.openwall.com/lists/oss-security/2016/07/31/6 Release Notes
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1362457 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1362457 Third Party Advisory, VDB Entry, Issue Tracking
    Added CWE CWE-119
    Added CWE CWE-362
  • Initial Analysis by [email protected]

    Aug. 10, 2016

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-6516 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-2016-6516 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation CAPEC-26: Leveraging Race Conditions Leveraging Race Conditions CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.09 }} 0.02%

score

0.38997

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: