CVE-2015-8872

Severity: medium (CVSS 6.2 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-06-03 · updated 2026-06-17
Weakness: CWE-189

Description

The set_fat function in fat.c in dosfstools before 4.0 might allow attackers to corrupt a FAT12 filesystem or cause a denial of service (invalid memory read and crash) by writing an odd number of clusters to the third to last entry on a FAT12 filesystem, which triggers an "off-by-two error."

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 15.10, 16.04
Dosfstools Project Dosfstools: through 3.0.28
openSUSE Leap: 42.1
Opensuse: 13.2

References

http://lists.opensuse.org/opensuse-updates/2016-06/msg00001.html
http://lists.opensuse.org/opensuse-updates/2016-09/msg00014.html
http://www.securityfocus.com/bid/90311
http://www.ubuntu.com/usn/USN-2986-1
https://blog.fuzzing-project.org/44-dosfstools-fsck.vfat-Several-invalid-memory-accesses.html
https://github.com/dosfstools/dosfstools/commit/07908124838afcc99c577d1d3e84cef2dbd39cb7
https://github.com/dosfstools/dosfstools/issues/12
https://github.com/dosfstools/dosfstools/releases/tag/v4.0
https://lists.debian.org/debian-lts-announce/2020/05/msg00028.html
http://lists.opensuse.org/opensuse-updates/2016-06/msg00001.html
http://lists.opensuse.org/opensuse-updates/2016-09/msg00014.html
http://www.securityfocus.com/bid/90311

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