CVE-2021-33285 Information

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 ytes_in_use\ field should be less than the ytes_allocated\ field. When it is not the parsing of the records proceeds into the wild.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp https://bugzilla.redhat.com/show_bug.cgi?id=2001608 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386 https://www.openwall.com/lists/oss-security/2021/08/30/1 http://www.openwall.com/lists/oss-security/2021/08/30/1 https://www.debian.org/security/2021/dsa-4971 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/ https://lists.debian.org/debian-lts-announce/2021/11/msg00013.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8