Ubuntu.comUB:CVE-2018-20482CVE-2018-20482
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
5.1%
GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage
during read access, which allows local users to cause a denial of service
(infinite read loop in sparse_dump_region in sparse.c) by modifying a file
that is supposed to be archived by a different user’s process (e.g., a
system backup running as root).
Bugs
References
lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html
launchpad.net/bugs/cve/CVE-2018-20482
news.ycombinator.com/item?id=18745431
nvd.nist.gov/vuln/detail/CVE-2018-20482
security-tracker.debian.org/tracker/CVE-2018-20482
twitter.com/thatcks/status/1076166645708668928
ubuntu.com/security/notices/USN-4692-1
utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug
www.cve.org/CVERecord?id=CVE-2018-20482
Related
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
5.1%