CVE-2021-33285
Published: 7 September 2021
In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute is supplied to the function ntfs_get_attribute_value, a heap buffer overflow can occur allowing for memory disclosure or denial of service. The vulnerability is caused by an out-of-bound buffer access which can be triggered by mounting a crafted ntfs partition. The root cause is a missing consistency check after reading an MFT record : the "bytes_in_use" field should be less than the "bytes_allocated" field. When it is not, the parsing of the records proceeds into the wild.
Priority
Status
Package | Release | Status |
---|---|---|
ntfs-3g Launchpad, Ubuntu, Debian |
upstream |
Needs triage
|
impish |
Released
(1:2017.3.23AR.3-3ubuntu5)
|
|
jammy |
Released
(1:2017.3.23AR.3-3ubuntu5)
|
|
bionic |
Released
(1:2017.3.23-2ubuntu0.18.04.3)
|
|
focal |
Released
(1:2017.3.23AR.3-3ubuntu1.1)
|
|
hirsute |
Released
(1:2017.3.23AR.3-3ubuntu4.1)
|
|
trusty |
Released
(1:2013.1.13AR.1-2ubuntu2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
xenial |
Released
(1:2015.3.14AR.1-1ubuntu0.3+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.8 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |