CVE-2021-4157

HIGH8.0

An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS)

Published Mar 25, 2022

Modified 1 years ago

No fix available

Details

An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system.

References

WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=2034342 WEBhttps://lore.kernel.org/lkml/20210517140244.822185482%40linuxfoundation.org/WEBhttps://security.netapp.com/advisory/ntap-20220602-0007/ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2021-4157 WEBhttps://www.oracle.com/security-alerts/cpujul2022.html

CVSS Analysis

CVSS v3.1

8.0

Exploitability

Attack Vector

AdjacentAV:A

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

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

Weakness Type (CWE)

Memory Safety

CWE-119

Buffer Overflow

Ecosystems

Timeline

PublishedMar 25, 2022

ModifiedAug 3, 2024