CVE-2014-8134

kernel: x86: espfix not working for 32-bit KVM paravirt guests

Severity Score

3.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The paravirt_ops_setup function in arch/x86/kernel/kvm.c in the Linux kernel through 3.18 uses an improper paravirt_enabled setting for KVM guest kernels, which makes it easier for guest OS users to bypass the ASLR protection mechanism via a crafted application that reads a 16-bit value.

La función paravirt_ops_setup en arch/x86/kernel/kvm.c en el kernel de Linux hasta 3.18 utiliza una configuración paravirt_enabled indebida para los kernels KVM invitados, lo que facilita a usuarios invitados del sistema operativo evadir el mecanismo de protección ASLR a través de una aplicación manipulada que lee un valor de 16 bits.

It was found that the espfix functionality does not work for 32-bit KVM paravirtualized guests. A local, unprivileged guest user could potentially use this flaw to leak kernel stack addresses.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2014-10-10 CVE Reserved
2014-12-12 CVE Published
2023-03-14 EPSS Updated
2024-08-06 CVE Updated
2024-08-06 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (15)

URL	Tag	Source
http://secunia.com/advisories/62336	Broken Link
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html	Third Party Advisory
http://www.securityfocus.com/bid/71650	Third Party Advisory
https://support.f5.com/csp/article/K17120	Third Party Advisory
https://support.f5.com/csp/article/K17120?utm_source=f5support&amp%3Butm_medium=RSS	X_refsource_confirm

URL	Date	SRC
http://www.spinics.net/lists/kvm/msg111458.html	2024-08-06

URL	Date	SRC
http://people.canonical.com/~ubuntu-security/cve/2014/CVE-2014-8134.html	2023-02-13
https://bugzilla.redhat.com/show_bug.cgi?id=1172765	2016-05-10

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html	2023-02-13
http://rhn.redhat.com/errata/RHSA-2016-0855.html	2023-02-13
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1400314	2023-02-13
https://access.redhat.com/security/cve/CVE-2014-8134	2016-05-10

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"				<= 3.18 Search vendor "Linux" for product "Linux Kernel" and version " <= 3.18"		-		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"		esm		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"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		lts		Affected
Opensuse Search vendor "Opensuse"		Evergreen Search vendor "Opensuse" for product "Evergreen"				11.4 Search vendor "Opensuse" for product "Evergreen" and version "11.4"		-		Affected
Opensuse Search vendor "Opensuse"		Opensuse Search vendor "Opensuse" for product "Opensuse"				13.1 Search vendor "Opensuse" for product "Opensuse" and version "13.1"		-		Affected
Suse Search vendor "Suse"		Suse Linux Enterprise Server Search vendor "Suse" for product "Suse Linux Enterprise Server"				11 Search vendor "Suse" for product "Suse Linux Enterprise Server" and version "11"		sp2, ltss		Affected
Oracle Search vendor "Oracle"		Linux Search vendor "Oracle" for product "Linux"				6 Search vendor "Oracle" for product "Linux" and version "6"		-		Affected