CVE Vulnerability

CVE-2018-1093

The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.

7.1 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

Scope

5.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f6f Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1560782 Issue Tracking Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=199181 Issue Tracking
http://openwall.com/lists/oss-security/2018/03/29/1 Mailing List
https://www.debian.org/security/2018/dsa-4188
https://lists.debian.org/debian-lts-announce/2018/06/msg00000.html
https://usn.ubuntu.com/3676-2/
https://usn.ubuntu.com/3676-1/
https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
https://usn.ubuntu.com/3754-1/
https://usn.ubuntu.com/3752-2/
https://usn.ubuntu.com/3752-1/
https://usn.ubuntu.com/3752-3/
Configurations

Configuration 1

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

Published : 2018-04-02 03:29

Updated : 2018-08-29 10:29

NVD link : CVE-2018-1093

Mitre link : CVE-2018-1093

Products Affected
No products.
CWE
CWE-125

Out-of-bounds Read