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).

CVSS v3 5.5 MEDIUM
CVSS v2.0 2.1 LOW

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

2.1^/10

CVSS v2.0 : LOW

V2 Legend

Vector : AV:L/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
http://www.securityfocus.com/bid/104909	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041414	Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:2948	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3083	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3096	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3459	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3540	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3586	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3590	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3591	Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8	Third Party Advisory
https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe	Patch Third Party Advisory
https://usn.ubuntu.com/3742-1/	Third Party Advisory
https://usn.ubuntu.com/3742-2/	Third Party Advisory
https://www.exploit-db.com/exploits/45175/	Exploit Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/104909	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041414	Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:2948	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3083	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3096	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3459	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3540	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3586	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3590	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3591	Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8	Third Party Advisory
https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe	Patch Third Party Advisory
https://usn.ubuntu.com/3742-1/	Third Party Advisory
https://usn.ubuntu.com/3742-2/	Third Party Advisory
https://www.exploit-db.com/exploits/45175/	Exploit Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:12.04::::esm:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::

Configuration 3 (hide)

OR	cpe:2.3:a:redhat:mrg_realtime:2.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:::::::*
	cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:::::::*

History

21 Nov 2024, 03:19

Information

Published : 2018-07-26 19:29

Updated : 2024-11-21 03:19

NVD link : CVE-2017-18344

Mitre link : CVE-2017-18344

CVE.ORG link : CVE-2017-18344

JSON object : View

Products Affected

redhat

mrg_realtime
enterprise_linux_server_tus
enterprise_linux_server_eus
enterprise_linux_server_aus
enterprise_linux_workstation
enterprise_linux_desktop
enterprise_linux_server

canonical

ubuntu_linux

linux

linux_kernel

CWE

CWE-125

Out-of-bounds Read

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"cve@mitre.org"}, {"url": "http://www.securityfocus.com/bid/104909", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://www.securitytracker.com/id/1041414", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:2948", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:3083", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:3096", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:3459", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:3540", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:3586", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:3590", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:3591", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://usn.ubuntu.com/3742-1/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://usn.ubuntu.com/3742-2/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.exploit-db.com/exploits/45175/", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "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/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE)."}, {"lang": "es", "value": "La implementaci\u00f3n de llamada del sistema timer_create en kernel/time/posix-timers.c en el kernel de Linux en versiones anteriores a la 4.14.8 no valida correctamente el campo sigevent->sigev_notify, conduciendo a un acceso fuera de l\u00edmites en la funci\u00f3n show_timer (que se llama cuando se lee /proc/$PID/timers). Esto permite que las aplicaciones del espacio del usuario lean memoria del kernel arbitraria (en un kernel construido con CONFIG_POSIX_TIMERS y CONFIG_CHECKPOINT_RESTORE)."}], "lastModified": "2024-11-21T03:19:53.350", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "41108D9D-6660-4D49-A5EE-169D8290F391", "versionEndExcluding": "4.14.8"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*", "vulnerable": true, "matchCriteriaId": "8D305F7A-D159-4716-AB26-5E38BB5CD991"}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:mrg_realtime:2.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AFB0FFE3-4BE1-4024-BCC6-1B87074DE2E3"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "33C068A4-3780-4EAB-A937-6082DF847564"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "51EF4996-72F4-4FA4-814F-F5991E7A8318"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1C8D871B-AEA1-4407-AEE3-47EC782250FF"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "98381E61-F082-4302-B51F-5648884F998B"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D99A687E-EAE6-417E-A88E-D0082BC194CD"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A8442C20-41F9-47FD-9A12-E724D3A31FD7"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A4E9DD8A-A68B-4A69-8B01-BFF92A2020A8"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6755B6AD-0422-467B-8115-34A60B1D1A40"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24C0F4E1-C52C-41E0-9F14-F83ADD5CC7ED"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D5F7E11E-FB34-4467-8919-2B6BEAABF665"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "825ECE2D-E232-46E0-A047-074B34DB1E97"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}

5.5 /10

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

2.1 /10

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

JSON object

Attach tags to CVE-2017-18344

5.5^/10

2.1^/10

Attach tags to `CVE-2017-18344`