CVE-2016-0728

Linux Kernel 4.4.1 - REFCOUNT Overflow Use-After-Free in Keyrings 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 join_session_keyring function in security/keys/process_keys.c in the Linux kernel before 4.4.1 mishandles object references in a certain error case, which allows local users to gain privileges or cause a denial of service (integer overflow and use-after-free) via crafted keyctl commands.

La función join_session_keyring en security/keys/process_keys.c en el kernel de Linux en versiones anteriores a 4.4.1 no maneja correctamente referencias a objetos en un cierto caso de error, lo que permite a usuarios locales obtener privilegios o provocar una denegación de servicio (desbordamiento de entero y uso después de liberación) a través de comandos keyctl manipulados.

A use-after-free flaw was found in the way the Linux kernel's key management subsystem handled keyring object reference counting in certain error path of the join_session_keyring() function. A local, unprivileged user could use this flaw to escalate their privileges on the system.

*Credits: N/A

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

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-12-16 CVE Reserved
2016-01-19 CVE Published
2016-01-19 First Exploit
2023-05-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free

CAPEC

References (48)

URL	Tag	Source
http://perception-point.io/2016/01/14/analysis-and-exploitation-of-a-linux-kernel-vulnerability-cve-2016-0728	Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/19/2	Mailing List
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html	Third Party Advisory
http://www.securityfocus.com/bid/81054	Third Party Advisory
http://www.securitytracker.com/id/1034701	Third Party Advisory
https://bto.bluecoat.com/security-advisory/sa112	Third Party Advisory
https://github.com/torvalds/linux/commit/23567fd052a9abb6d67fe8e7a9ccdd9800a540f2	Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05130958	Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380	Third Party Advisory
https://security.netapp.com/advisory/ntap-20160211-0001	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/40003	2016-01-19
https://www.exploit-db.com/exploits/39277	2024-08-05
https://github.com/hal0taso/CVE-2016-0728	2017-05-24
https://github.com/googleweb/CVE-2016-0728	2016-01-20
https://github.com/th30d00r/Linux-Vulnerability-CVE-2016-0728-and-Exploit	2020-05-12

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=23567fd052a9abb6d67fe8e7a9ccdd9800a540f2	2023-02-12
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html	2023-02-12
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176194.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00026.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00012.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00033.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00034.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00035.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00038.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00041.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00044.html	2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00045.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-0064.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-0065.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-0068.html	2023-02-12
http://source.android.com/security/bulletin/2016-03-01.html	2023-02-12
http://www.debian.org/security/2016/dsa-3448	2023-02-12
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1	2023-02-12
http://www.ubuntu.com/usn/USN-2870-1	2023-02-12
http://www.ubuntu.com/usn/USN-2870-2	2023-02-12
http://www.ubuntu.com/usn/USN-2871-1	2023-02-12
http://www.ubuntu.com/usn/USN-2871-2	2023-02-12
http://www.ubuntu.com/usn/USN-2872-1	2023-02-12
http://www.ubuntu.com/usn/USN-2872-2	2023-02-12
http://www.ubuntu.com/usn/USN-2872-3	2023-02-12
http://www.ubuntu.com/usn/USN-2873-1	2023-02-12
https://bugzilla.redhat.com/show_bug.cgi?id=1297475	2016-02-02
https://h20565.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05018265	2023-02-12
https://access.redhat.com/security/cve/CVE-2016-0728	2016-02-02
https://access.redhat.com/node/2131021	2016-02-02

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.0 Search vendor "Google" for product "Android" and version "4.0"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.0.1 Search vendor "Google" for product "Android" and version "4.0.1"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.0.2 Search vendor "Google" for product "Android" and version "4.0.2"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.0.3 Search vendor "Google" for product "Android" and version "4.0.3"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.0.4 Search vendor "Google" for product "Android" and version "4.0.4"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.1 Search vendor "Google" for product "Android" and version "4.1"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.1.2 Search vendor "Google" for product "Android" and version "4.1.2"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.2 Search vendor "Google" for product "Android" and version "4.2"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.2.1 Search vendor "Google" for product "Android" and version "4.2.1"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.2.2 Search vendor "Google" for product "Android" and version "4.2.2"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.3 Search vendor "Google" for product "Android" and version "4.3"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.3.1 Search vendor "Google" for product "Android" and version "4.3.1"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.4 Search vendor "Google" for product "Android" and version "4.4"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.4.1 Search vendor "Google" for product "Android" and version "4.4.1"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.4.2 Search vendor "Google" for product "Android" and version "4.4.2"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				4.4.3 Search vendor "Google" for product "Android" and version "4.4.3"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				5.0 Search vendor "Google" for product "Android" and version "5.0"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				5.0.1 Search vendor "Google" for product "Android" and version "5.0.1"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				5.0.2 Search vendor "Google" for product "Android" and version "5.0.2"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				5.1 Search vendor "Google" for product "Android" and version "5.1"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				5.1.0 Search vendor "Google" for product "Android" and version "5.1.0"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				5.1.1 Search vendor "Google" for product "Android" and version "5.1.1"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				6.0 Search vendor "Google" for product "Android" and version "6.0"		-		Affected
Google Search vendor "Google"		Android Search vendor "Google" for product "Android"				6.0.1 Search vendor "Google" for product "Android" and version "6.0.1"		-		Affected
Hp Search vendor "Hp"		Server Migration Pack Search vendor "Hp" for product "Server Migration Pack"				<= 7.5 Search vendor "Hp" for product "Server Migration Pack" and version " <= 7.5"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.8 < 3.10.95 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.8 < 3.10.95"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.11 < 3.12.53 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.11 < 3.12.53"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 3.14.59 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 3.14.59"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.15 < 3.16.35 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 3.16.35"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.17 < 3.18.26 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.17 < 3.18.26"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.19 < 4.1.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.19 < 4.1.16"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.2 < 4.3.4 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.3.4"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.4 < 4.4.1 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 4.4.1"		-		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
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				15.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "15.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				15.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "15.10"		-		Affected