CVE-2017-16939

Linux Kernel (Ubuntu 17.04) - 'XFRM' Local Privilege Escalation

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.

La implementación de políticas de volcado XFRM en net/xfrm/xfrm_user.c en el kernel de Linux en versiones anteriores a la 4.13.11 permite que usuarios locales obtengan privilegios o provoquen una denegación de servicio (uso de memoria previamente liberada) mediante una llamada del sistema a setsockopt con la opción SO_RCVBUF junto con mensajes Netlink XFRM_MSG_GETPOLICY.

The Linux kernel is vulerable to a use-after-free flaw when Transformation User configuration interface(CONFIG_XFRM_USER) compile-time configuration were enabled. This vulnerability occurs while closing a xfrm netlink socket in xfrm_dump_policy_done. A user/process could abuse this flaw to potentially escalate their privileges on a system.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Attack Vector

Local

Attack Complexity

High

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-11-23 First Exploit
2017-11-24 CVE Reserved
2017-11-24 CVE Published
2023-05-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free

CAPEC

References (17)

URL	Tag	Source
http://seclists.org/fulldisclosure/2017/Nov/40	Mailing List
http://www.securityfocus.com/bid/101954	Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1069702	Issue Tracking
https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html	Mailing List

URL	Date	SRC
https://www.exploit-db.com/exploits/44049	2017-11-23
https://blogs.securiteam.com/index.php/archives/3535	2024-08-05

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2	2023-01-19
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11	2023-01-19
https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df2	2023-01-19

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html	2023-01-19
https://access.redhat.com/errata/RHSA-2018:1318	2023-01-19
https://access.redhat.com/errata/RHSA-2018:1355	2023-01-19
https://access.redhat.com/errata/RHSA-2019:1170	2023-01-19
https://access.redhat.com/errata/RHSA-2019:1190	2023-01-19
https://www.debian.org/security/2018/dsa-4082	2023-01-19
https://access.redhat.com/security/cve/CVE-2017-16939	2019-05-14
https://bugzilla.redhat.com/show_bug.cgi?id=1517220	2019-05-14

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"				>= 2.6.28 < 3.2.97 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.28 < 3.2.97"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.3 < 3.16.52 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.3 < 3.16.52"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.17 < 3.18.86 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.17 < 3.18.86"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.19 < 4.1.48 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.19 < 4.1.48"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.2 < 4.4.104 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.4.104"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 4.9.60 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.60"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.10 < 4.13.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.10 < 4.13.11"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected