CVE-2013-1943 : The KVM subsystem in the Linux kernel before 3.0 does not check whether kernel addresses are specified during allocation

The KVM subsystem in the Linux kernel before 3.0 does not check whether kernel addresses are specified during allocation of memory slots for use in a guest's physical address space, which allows local users to gain privileges or obtain sensitive information from kernel memory via a crafted application, related to arch/x86/kvm/paging_tmpl.h and virt/kvm/kvm_main.c.

Published 2013-07-16 14:08:51

Updated 2023-02-13 04:42:19

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Input validation

Threat overview for CVE-2013-1943

Top countries where our scanners detected CVE-2013-1943

Top open port discovered on systems with this issue 53

IPs affected by CVE-2013-1943 2,700

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2013-1943!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2013-1943

Probability of exploitation activity in the next 30 days: 0.09%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 39 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2013-1943

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.4	MEDIUM	AV:L/AC:M/Au:N/C:P/I:P/A:P	3.4	6.4	NIST
Access Vector: Local Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2013-1943

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2013-1943

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fa3d315a4ce2c0891cdde262562e710d95fba19e
https://github.com/torvalds/linux/commit/fa3d315a4ce2c0891cdde262562e710d95fba19e

KVM: Validate userspace_addr of memslot when registered · torvalds/linux@fa3d315 · GitHub
Patch;Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=950490

950490 – (CVE-2013-1943) CVE-2013-1943 kernel: kvm: missing check in kvm_set_memory_region()
Issue Tracking;Patch;Third Party Advisory
http://www.ubuntu.com/usn/USN-1939-1

USN-1939-1: Linux kernel vulnerabilities | Ubuntu security notices
Third Party Advisory

CVEs referencing this url

Products affected by CVE-2013-1943