CVE-2018-1093
7.1 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.8 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
61.4%
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.
Affected configurations
References
openwall.com/lists/oss-security/2018/03/29/1
bugzilla.kernel.org/show_bug.cgi?id=199181
bugzilla.redhat.com/show_bug.cgi?id=1560782
git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f6f
lists.debian.org/debian-lts-announce/2018/06/msg00000.html
lists.debian.org/debian-lts-announce/2018/07/msg00015.html
lists.debian.org/debian-lts-announce/2018/07/msg00016.html
usn.ubuntu.com/3676-1/
usn.ubuntu.com/3676-2/
usn.ubuntu.com/3752-1/
usn.ubuntu.com/3752-2/
usn.ubuntu.com/3752-3/
usn.ubuntu.com/3754-1/
www.debian.org/security/2018/dsa-4188
Related
7.1 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.8 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
61.4%