CVE-2018-12233

In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in JFS can be triggered by calling setxattr twice with two different extended attribute names on the same file. This vulnerability can be triggered by an unprivileged user with the ability to create files and execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.

CVSS v3.0 7.8 HIGH
CVSS v2.0 6.8 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

Vector : AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://lkml.org/lkml/2018/6/2/2	Third Party Advisory
https://marc.info/?l=linux-kernel&m=152814391530549&w=2	Third Party Advisory
http://www.securityfocus.com/bid/104452	Third Party Advisory VDB Entry
https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html	Third Party Advisory
https://usn.ubuntu.com/3754-1/	Third Party Advisory
https://usn.ubuntu.com/3753-2/	Third Party Advisory
https://usn.ubuntu.com/3753-1/	Third Party Advisory
https://usn.ubuntu.com/3752-2/	Third Party Advisory
https://usn.ubuntu.com/3752-1/	Third Party Advisory
https://usn.ubuntu.com/3752-3/	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::

Information

Published : 2018-06-12 12:29

Updated : 2019-03-27 16:11

NVD link : CVE-2018-12233

Mitre link : CVE-2018-12233

JSON object : View

Products Affected

linux

linux_kernel

canonical

ubuntu_linux

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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