CVE-2018-15594

kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtual guests.

arch/x86/kernel/paravirt.c en el kernel de Linux en versiones anteriores a la 4.18.1 maneja incorrectamente algunas llamadas indirectas, lo que hace que sea más fácil para los atacantes realizar ataques Spectre-v2 contra guests paravirtuales.

It was found that paravirt_patch_call/jump() functions in the arch/x86/kernel/paravirt.c in the Linux kernel mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-08-20 CVE Reserved
2018-08-20 CVE Published
2023-08-14 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CAPEC

References (20)

URL	Tag	Source
http://www.securityfocus.com/bid/105120	Third Party Advisory
http://www.securitytracker.com/id/1041601	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html	Mailing List
https://twitter.com/grsecurity/status/1029324426142199808	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5800dc5c19f34e6e03b5adab1282535cb102fafd	2019-10-03
https://github.com/torvalds/linux/commit/5800dc5c19f34e6e03b5adab1282535cb102fafd	2019-10-03

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html	2019-10-03
https://access.redhat.com/errata/RHSA-2019:2029	2019-10-03
https://access.redhat.com/errata/RHSA-2019:2043	2019-10-03
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1	2019-10-03
https://usn.ubuntu.com/3775-1	2019-10-03
https://usn.ubuntu.com/3775-2	2019-10-03
https://usn.ubuntu.com/3776-1	2019-10-03
https://usn.ubuntu.com/3776-2	2019-10-03
https://usn.ubuntu.com/3777-1	2019-10-03
https://usn.ubuntu.com/3777-2	2019-10-03
https://usn.ubuntu.com/3777-3	2019-10-03
https://www.debian.org/security/2018/dsa-4308	2019-10-03
https://access.redhat.com/security/cve/CVE-2018-15594	2019-08-07
https://bugzilla.redhat.com/show_bug.cgi?id=1620555	2019-08-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
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
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		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"		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"		lts		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
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.18.1 Search vendor "Linux" for product "Linux Kernel" and version " < 4.18.1"		-		Affected