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Vulnerability Details : CVE-2017-18344

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).
Publish Date : 2018-07-26 Last Update Date : 2020-10-15
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- CVSS Scores & Vulnerability Types

CVSS Score
2.1
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 125

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2018:3083: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20183083 unix
RHSA-2018:3096: kernel-rt security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20183096 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2017-18344

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 12.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
3 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
4 OS Redhat Enterprise Linux Desktop 7.0 * * * Version Details Vulnerabilities
5 OS Redhat Enterprise Linux Server 7.0 * * * Version Details Vulnerabilities
6 OS Redhat Enterprise Linux Server Aus 7.2 * * * Version Details Vulnerabilities
7 OS Redhat Enterprise Linux Server Aus 7.3 * * * Version Details Vulnerabilities
8 OS Redhat Enterprise Linux Server Aus 7.4 * * * Version Details Vulnerabilities
9 OS Redhat Enterprise Linux Server Eus 7.3 * * * Version Details Vulnerabilities
10 OS Redhat Enterprise Linux Server Eus 7.5 * * * Version Details Vulnerabilities
11 OS Redhat Enterprise Linux Server Tus 7.2 * * * Version Details Vulnerabilities
12 OS Redhat Enterprise Linux Server Tus 7.3 * * * Version Details Vulnerabilities
13 OS Redhat Enterprise Linux Server Tus 7.4 * * * Version Details Vulnerabilities
14 OS Redhat Enterprise Linux Workstation 7.0 * * * Version Details Vulnerabilities
15 Application Redhat Mrg Realtime 2.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 2
Linux Linux Kernel 1
Redhat Enterprise Linux Desktop 1
Redhat Enterprise Linux Server 1
Redhat Enterprise Linux Server Aus 3
Redhat Enterprise Linux Server Eus 2
Redhat Enterprise Linux Server Tus 3
Redhat Enterprise Linux Workstation 1
Redhat Mrg Realtime 1

- References For CVE-2017-18344

https://access.redhat.com/errata/RHSA-2018:3540
REDHAT RHSA-2018:3540
https://www.exploit-db.com/exploits/45175/
EXPLOIT-DB 45175
https://access.redhat.com/errata/RHSA-2018:3586
REDHAT RHSA-2018:3586
https://access.redhat.com/errata/RHSA-2018:3591
REDHAT RHSA-2018:3591
https://access.redhat.com/errata/RHSA-2018:3459
REDHAT RHSA-2018:3459
https://usn.ubuntu.com/3742-1/
UBUNTU USN-3742-1
https://access.redhat.com/errata/RHSA-2018:2948
REDHAT RHSA-2018:2948
https://access.redhat.com/errata/RHSA-2018:3096
REDHAT RHSA-2018:3096
https://usn.ubuntu.com/3742-2/
UBUNTU USN-3742-2
https://access.redhat.com/errata/RHSA-2018:3590
REDHAT RHSA-2018:3590
http://www.securitytracker.com/id/1041414
SECTRACK 1041414
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8
http://www.securityfocus.com/bid/104909
BID 104909 Linux Kernel 'kernel/time/posix-timers.c' Local Information Disclosure Vulnerability Release Date:2018-07-26
https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe
https://access.redhat.com/errata/RHSA-2018:3083
REDHAT RHSA-2018:3083

- Metasploit Modules Related To CVE-2017-18344

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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