Denial of service in Linux Kernel

1) NULL pointer dereference

EUVDB-ID: #VU11191

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-1066

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the fs/cifs/cifsencrypt.c:setup_ntlmv2_rsp() function due to NULL pointer dereference. A remote attacker can cause the service to crash.

Mitigation

Update to version 4.11.

Vulnerable software versions

Linux kernel: 4.6 rc1 - 4.10.15

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.6.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.7.9:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.8.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.11:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.10.15:*:*:*:*:*:*:*

External links

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cabfb3680f78981d26c078...

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.