CVE-2018-1093
Published: 1 April 2018
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.
From the Ubuntu Security Team
Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly handle corrupted meta data in some situations. An attacker could use this to specially craft an ext4 filesystem that caused a denial of service (system crash) when mounted.
Priority
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
artful |
Ignored
(reached end-of-life)
|
bionic |
Released
(4.15.0-33.36)
|
|
cosmic |
Not vulnerable
(4.17.0-6.7)
|
|
precise |
Ignored
(was needs-triage ESM criteria)
|
|
trusty |
Released
(3.13.0-157.207)
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.4.0-128.154)
|
|
Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||
linux-aws Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1020.20)
|
|
cosmic |
Not vulnerable
(4.15.0-1020.20)
|
|
precise |
Does not exist
|
|
trusty |
Released
(4.4.0-1023.23)
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.4.0-1061.70)
|
|
linux-azure Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1022.23)
|
|
cosmic |
Not vulnerable
(4.18.0-1003.3)
|
|
precise |
Does not exist
|
|
trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.15.0-1022.22~16.04.1)
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1003.3~18.04.1)
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.15.0-1022.23)
|
|
linux-euclid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(was needs-triage ESM criteria)
|
|
linux-flo Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-gcp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1018.19)
|
|
cosmic |
Not vulnerable
(4.15.0-1018.19)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.15.0-1018.19~16.04.2)
|
|
linux-gke Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.15.0-33.36~16.04.1)
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.18.0-11.12~18.04.1)
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.15.0-33.36~16.04.1)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1020.20)
|
|
cosmic |
Not vulnerable
(4.15.0-1020.20)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.4.0-1027.32)
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Ignored
(was needed ESM criteria)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [out of standard support])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [out of standard support])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [out of standard support])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Released
(4.4.0-128.154~14.04.1)
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1017.20)
|
|
cosmic |
Not vulnerable
(4.15.0-1017.20)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Ignored
(reached end-of-life)
|
bionic |
Released
(4.15.0-1021.23)
|
|
cosmic |
Not vulnerable
(4.15.0-1021.23)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.4.0-1091.99)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Released
(4.4.0-1094.99)
|
bionic |
Not vulnerable
|
|
cosmic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.4.0-1094.99)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1093
- https://bugzilla.kernel.org/show_bug.cgi?id=199181
- https://ubuntu.com/security/notices/USN-3676-1
- https://ubuntu.com/security/notices/USN-3676-2
- https://ubuntu.com/security/notices/USN-3752-1
- https://ubuntu.com/security/notices/USN-3752-2
- https://ubuntu.com/security/notices/USN-3754-1
- https://ubuntu.com/security/notices/USN-3752-3
- NVD
- Launchpad
- Debian