CVE-2018-7757

kernel: Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (memory consumption) via many read accesses to files in the /sys/class/sas_phy directory, as demonstrated by the /sys/class/sas_phy/phy-1:0:12/invalid_dword_count file.

Filtrado de memoria en la función sas_smp_get_phy_events en drivers/scsi/libsas/sas_expander.c en el kernel de Linux, hasta la versión 4.15.7, permite que usuarios locales provoquen una denegación de servicio (consumo de memoria) mediante numerosos accesos de lectura a archivos en el directorio /sys/class/sas_phy, tal y como demuestra el archivo /sys/class/sas_phy/phy-1:0:12/invalid_dword_count.

Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c in the Linux kernel allows local users to cause a denial of service (kernel memory exhaustion) via multiple read accesses to files in the /sys/class/sas_phy directory.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-03-08 CVE Reserved
2018-03-08 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-772: Missing Release of Resource after Effective Lifetime

CAPEC

References (18)

URL	Tag	Source
http://www.securityfocus.com/bid/103348	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html	Mailing List

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4a491b1ab11ca0556d2fda1ff1301e862a2d44c4	2019-10-03
https://github.com/torvalds/linux/commit/4a491b1ab11ca0556d2fda1ff1301e862a2d44c4	2019-10-03

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:2948	2019-10-03
https://access.redhat.com/errata/RHSA-2018:3083	2019-10-03
https://access.redhat.com/errata/RHSA-2018:3096	2019-10-03
https://usn.ubuntu.com/3654-1	2019-10-03
https://usn.ubuntu.com/3654-2	2019-10-03
https://usn.ubuntu.com/3656-1	2019-10-03
https://usn.ubuntu.com/3697-1	2019-10-03
https://usn.ubuntu.com/3697-2	2019-10-03
https://usn.ubuntu.com/3698-1	2019-10-03
https://usn.ubuntu.com/3698-2	2019-10-03
https://www.debian.org/security/2018/dsa-4187	2019-10-03
https://www.debian.org/security/2018/dsa-4188	2019-10-03
https://access.redhat.com/security/cve/CVE-2018-7757	2018-10-30
https://bugzilla.redhat.com/show_bug.cgi?id=1553361	2018-10-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 4.15.7 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.15.7"		-		Affected