National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2016-7916 Detail

Current Description

Race condition in the environ_read function in fs/proc/base.c in the Linux kernel before 4.5.4 allows local users to obtain sensitive information from kernel memory by reading a /proc/*/environ file during a process-setup time interval in which environment-variable copying is incomplete.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.5 MEDIUM
Vector: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.8


Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 4.7 MEDIUM
Vector: (AV:L/AC:M/Au:N/C:C/I:N/A:N) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 3.4


Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Complete
Integrity (I): None
Availability (A): None
Additional Information:
Victim must voluntarily interact with attack mechanism
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8148a73c9901a8794a50f950083c00ccf97d43b3 Issue Tracking Patch Third Party Advisory
http://source.android.com/security/bulletin/2016-11-01.html Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.4 Release Notes Vendor Advisory
http://www.securityfocus.com/bid/94138 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-3159-1
http://www.ubuntu.com/usn/USN-3159-2
https://bugzilla.kernel.org/show_bug.cgi?id=116461 Issue Tracking
https://forums.grsecurity.net/viewtopic.php?f=3&t=4363 Issue Tracking
https://github.com/torvalds/linux/commit/8148a73c9901a8794a50f950083c00ccf97d43b3 Issue Tracking Patch Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (CWE-362)

Known Affected Software Configurations Switch to CPE 2.3

Configuration 1 ( hide )
 cpe:/o:linux:linux_kernel
     Show Matching CPE(s)
Up to (including)
4.5.3


Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-7916
NVD Published Date:
11/16/2016
NVD Last Modified:
01/17/2017