CVE-2023-5368
On an msdosfs filesystem, the 'truncate' or 'ftruncate' system calls under certain circumstances populate the additional space in the file with unallocated data from the underlying disk device, rather than zero bytes.
Does this matter?
Lower severity and a low EPSS score (0.53%). Track it; it rarely justifies an emergency change on its own.
Description
On an msdosfs filesystem, the 'truncate' or 'ftruncate' system calls under certain circumstances populate the additional space in the file with unallocated data from the underlying disk device, rather than zero bytes. This may permit a user with write access to files on a msdosfs filesystem to read unintended data (e.g. from a previously deleted file).
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.53% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1188
- Affected
- freebsd/freebsd
- Source
- secteam@freebsd.org
References
- https://dfir.ru/2023/11/01/bringing-unallocated-data-back-the-fat12-16-32-case/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-23:12.msdosfs.ascPatch
- https://security.netapp.com/advisory/ntap-20231124-0004/
- https://dfir.ru/2023/11/01/bringing-unallocated-data-back-the-fat12-16-32-case/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-23:12.msdosfs.ascPatch
- https://security.netapp.com/advisory/ntap-20231124-0004/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.