Denial of service vulnerabilities in Linux Kernel
| Risk | Low |
| Patch available | NO |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2018-19406 CVE-2018-19407 |
| CWE-ID | CWE-476 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #2 is available. |
| Vulnerable software |
Linux kernel Operating systems & Components / Operating system |
| Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Null pointer dereference
EUVDB-ID: #VU16021
Risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-19406
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in the kvm_pv_send_ipi function, as defined in the arch/x86/kvm/lapic.c source code file due to the failure of the Advanced Programmable Interrupt Controller (APIC) map to initialize. A local attacker can access the system and execute an application that submits malicious system calls, trigger a NULL pointer dereference, which could result in a DoS condition.
MitigationCybersecurity Help is currently unaware of any solutions addressing the vulnerability.
Vulnerable software versionsLinux kernel: 4.15.0 rc4 - 4.19.2
CPE2.3 External linkshttps://lkml.org/lkml/2018/11/20/411
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Null pointer dereference
EUVDB-ID: #VU16022
Risk: Low
CVSSv4.0: 5.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2018-19407
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in the vcpu_scan_ioapic function, as defined in the arch/x86/kvm/x86.c source code file due to the failure of the I/O Advanced Programmable Interrupt Controller (I/O APIC) to initialize. A local attacker can access the system and execute an application that submits malicious system calls, trigger a NULL pointer dereference, which could result in a DoS condition.
MitigationCybersecurity Help is currently unaware of any solutions addressing the vulnerability.
Vulnerable software versionsLinux kernel: 4.15.0 rc4 - 4.19.2
CPE2.3https://lkml.org/lkml/2018/11/20/580
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
