CVE-2021-33285
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Tuxera Ntfs-3g
PublishedSep 7, 2021
First seenSep 7, 2021
Weakness typeCWE-20Improper input validation
How to fix
Update
- tuxera ntfs-3g2021.8.22 or later
Vendor advisories
- debian.org/security/2021/dsa-4971
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/
- security.gentoo.org/glsa/202301-01
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| tuxera ntfs-3g | v < 2021.8.22 | 2021.8.22 |
| redhat enterprise_linux | 7.0, 8.0 | — |
| fedoraproject fedora | 33, 34, 35 | — |
| debian debian_linux | 9.0, 10.0, 11.0 | — |
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