Linux Kernel up to 4.19.2 System Call arch/x86/kvm/lapic.c null pointer dereference
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
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4.3 | $0-$5k | 0.00 |
A vulnerability was found in Linux Kernel up to 4.19.2 (Operating System). It has been classified as problematic. Affected is an unknown function of the file arch/x86/kvm/lapic.c of the component System Call Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:
kvm_pv_send_ipi in arch/x86/kvm/lapic.c in the Linux kernel through 4.19.2 allows local users to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a situation where the apic map is uninitialized.
The bug was discovered 11/20/2018. The weakness was published 11/21/2018 (Website). The advisory is available at securityfocus.com. This vulnerability is traded as CVE-2018-19406 since 11/20/2018. Local access is required to approach this attack. The successful exploitation requires a authentication. Technical details are known, but there is no available exploit.
The vulnerability scanner Nessus provides a plugin with the ID 120661 (Fedora 28 : kernel / kernel-headers / kernel-tools (2018-a0914af224)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l.
Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (120661). Similar entry is available at 127051.
Product
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Vendor
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Version
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CPE 2.3
CPE 2.2
CVSSv4
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CVSSv3
VulDB Meta Base Score: 4.4VulDB Meta Temp Score: 4.3
VulDB Base Score: 3.3
VulDB Temp Score: 3.2
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NVD Base Score: 5.5
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CVSSv2
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Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
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Nessus ID: 120661
Nessus Name: Fedora 28 : kernel / kernel-headers / kernel-tools (2018-a0914af224)
Nessus File: 🔍
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
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Countermeasures
Recommended: UpgradeStatus: 🔍
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Timeline
11/20/2018 🔍11/20/2018 🔍
11/20/2018 🔍
11/20/2018 🔍
11/21/2018 🔍
11/21/2018 🔍
12/11/2018 🔍
01/03/2019 🔍
06/11/2023 🔍
Sources
Vendor: kernel.orgAdvisory: FEDORA-2018-a0914af224⛔
Status: Not defined
CVE: CVE-2018-19406 (🔍)
SecurityFocus: 105988 - Linux Kernel CVE-2018-19406 Local Denial of Service Vulnerability
See also: 🔍
Entry
Created: 11/21/2018 12:10Updated: 06/11/2023 09:19
Changes: 11/21/2018 12:10 (72), 04/14/2020 12:26 (5), 06/11/2023 09:19 (4)
Complete: 🔍
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