Vulnerability CVE-2018-16884


Published: 2018-12-18

Description:
A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

Type:

CWE-416

(Use After Free)

Vendor: Debian
Product: Debian linux 
Version: 8.0;
Vendor: Redhat
Product: Enterprise linux 
Version: 7.0;
Product: Enterprise mrg 
Version: 2.0;
Vendor: Canonical
Product: Ubuntu linux 
Version: 16.04; 14.04;
Vendor: Linux
Product: Linux kernel 

CVSS2 => (AV:A/AC:L/Au:S/C:P/I:P/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.7/10
8.5/10
5.1/10
Exploit range
Attack complexity
Authentication
Adjacent network
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Complete

 References:
http://www.securityfocus.com/bid/106253
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16884
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
https://patchwork.kernel.org/cover/10733767/
https://patchwork.kernel.org/patch/10733769/
https://support.f5.com/csp/article/K21430012
https://usn.ubuntu.com/3932-1/
https://usn.ubuntu.com/3932-2/
https://usn.ubuntu.com/3980-1/
https://usn.ubuntu.com/3980-2/
https://usn.ubuntu.com/3981-1/
https://usn.ubuntu.com/3981-2/

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