#VU10001 Null pointer dereference in Linux kernel - CVE-2018-5333

Vulnerability identifier: #VU10001

Vulnerability risk: Medium

CVSSv4.0: 8.7 [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:A/U:Green]

CVE-ID: CVE-2018-5333

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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

The weakness exists in the rds_cmsg_atomic function due to insufficient handling of user-supplied input. A remote attacker can send a specially crafted HTTP request, trigger NULL pointer dereference and cause the system to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.14.1 - 4.14.13

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External links
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7d11f77f84b27cef452cee...

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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. However, a fully functional exploit for this vulnerability is available.