CVE-2021-33285
Publication date 7 September 2021
Last updated 24 July 2024
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| ntfs-3g | 22.04 LTS jammy |
Fixed 1:2017.3.23AR.3-3ubuntu5
|
| 20.04 LTS focal |
Fixed 1:2017.3.23AR.3-3ubuntu1.1
|
|
| 18.04 LTS bionic |
Fixed 1:2017.3.23-2ubuntu0.18.04.3
|
|
| 16.04 LTS xenial |
Fixed 1:2015.3.14AR.1-1ubuntu0.3+esm1
|
|
| 14.04 LTS trusty |
Fixed 1:2013.1.13AR.1-2ubuntu2+esm1
|
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Get Ubuntu ProSeverity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.8 · High
|
| 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 |