CVE-2018-20482

CVSS V2 Low 1.9 CVSS V3 Medium 4.7
Description
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).
Overview
  • CVE ID
  • CVE-2018-20482
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-12-26T18:29:00
  • Last Modified Date
  • 2021-11-30T19:52:03
Weakness Enumerations
CWE URL
CWE-835 http://cwe.mitre.org/data/definitions/835.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:gnu:tar:*:*:*:*:*:*:*:* 1 OR 1.30
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:M/Au:N/C:N/I:N/A:P
  • Access Vector
  • LOCAL
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 1.9
  • Severity
  • LOW
  • Exploitability Score
  • 3.4
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 4.7
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug Patch Third Party Advisory
https://twitter.com/thatcks/status/1076166645708668928 Patch Third Party Advisory
https://news.ycombinator.com/item?id=18745431 Exploit Third Party Advisory
http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html Mailing List Third Party Advisory
http://www.securityfocus.com/bid/106354 Third Party Advisory VDB Entry
http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454 Patch Third Party Advisory
https://security.gentoo.org/glsa/201903-05 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html Mailing List Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-20482
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20482
History
Created Old Value New Value Data Type Notes
2022-05-10 06:44:21 Added to TrackCVE
2022-12-03 15:46:17 2018-12-26T18:29Z 2018-12-26T18:29:00 CVE Published Date updated
2022-12-03 15:46:17 2021-11-30T19:52:03 CVE Modified Date updated
2022-12-03 15:46:17 Analyzed Vulnerability Status updated