CVE-2020-25212

2020-09-0900:00:00

ubuntu.com

toctou

nfs

linux

memory corruption

CVSS2

4.4

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:P/A:P

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

Percentile

5.1%

JSON

A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3
could be used by local attackers to corrupt memory or possibly have
unspecified other impact because a size check is in fs/nfs/nfs4proc.c
instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-121.123UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-48.52UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-190.220UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1086.91UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1025.25UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1078.82UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1114.127UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1025.25~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1085.90~16.04.1UNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1026.26UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-121.123	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-48.52	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-190.220	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1086.91	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1025.25	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1078.82	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1114.127	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1025.25~18.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1085.90~16.04.1	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1026.26	UNKNOWN