CVE-2018-20482
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2018-20482
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20482.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2018-20482
- Downstream
- Related
- Published
- 2018-12-26T18:29:00.373Z
- Modified
- 2025-11-26T00:28:40.490765Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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 sparsedumpregion 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).
- References
-
- http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454
- http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html
- http://www.securityfocus.com/bid/106354
- https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html
- https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html
- https://news.ycombinator.com/item?id=18745431
- https://security.gentoo.org/glsa/201903-05
- https://twitter.com/thatcks/status/1076166645708668928
- https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug