CVE-2017-14954 : The waitid implementation in kernel/exit.c in the Linux kernel through 4.13.4 ac

The waitid implementation in kernel/exit.c in the Linux kernel through 4.13.4 accesses rusage data structures in unintended cases, which allows local users to obtain sensitive information, and bypass the KASLR protection mechanism, via a crafted system call.

Published 2017-10-02 01:29:00

Updated 2017-10-06 14:06:02

Source MITRE

View at NVD, CVE.org

Vulnerability category: Information leak

Products affected by CVE-2017-14954

Linux » Linux Kernel
Versions up to, including, (<=) 4.13.4
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2017-14954

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 6 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-14954

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:P/I:N/A:N	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
5.5	MEDIUM	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2017-14954

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-14954

https://twitter.com/_argp/status/914021130712870912

argp on Twitter: "Linux kernel 4.13 waitid(2) 144 bytes infoleak by spender: https://t.co/0yzDYK6uLM"
Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6c85501f2fabcfc4fc6ed976543d252c4eaf4be9

kernel/git/torvalds/linux.git - Linux kernel source tree
Issue Tracking;Patch;Third Party Advisory
https://twitter.com/grsecurity/status/914079864478666753

grsecurity on Twitter: "The infoleak was neither inserted nor discovered by me, just the exploit (couple minutes of work, no big deal)… "
Third Party Advisory
https://grsecurity.net/~spender/exploits/wait_for_kaslr_to_be_effective.c

Third Party Advisory
https://github.com/torvalds/linux/commit/6c85501f2fabcfc4fc6ed976543d252c4eaf4be9

fix infoleak in waitid(2) · torvalds/linux@6c85501 · GitHub
Issue Tracking;Patch;Third Party Advisory

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Vulnerability Details : CVE-2017-14954

Products affected by CVE-2017-14954

Exploit prediction scoring system (EPSS) score for CVE-2017-14954

CVSS scores for CVE-2017-14954

CWE ids for CVE-2017-14954

References for CVE-2017-14954