CVEvulnerability
CVE-2018-20482
4.7 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2018-12-26
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.7 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 1.9 LOW — AV:L/AC:M/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-835
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).
Affected configurations
• gnu tar (<= 1.30)
• debian debian linux 8.0
• debian debian linux 9.0
• opensuse leap 15.0
Related
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness
References
- http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454 Patch, Third Party Advisory
- http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/106354 Third Party Advisory, VDB Entry
- https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html Mailing List, Third Party Advisory
- https://news.ycombinator.com/item?id=18745431 Exploit, Third Party Advisory
- https://security.gentoo.org/glsa/201903-05 Third Party Advisory
- https://twitter.com/thatcks/status/1076166645708668928 Patch, Third Party Advisory
- https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug Patch, Third Party Advisory
- http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454 Patch, Third Party Advisory
- http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/106354 Third Party Advisory, VDB Entry
- https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html Mailing List, Third Party Advisory
- https://news.ycombinator.com/item?id=18745431 Exploit, Third Party Advisory
- https://security.gentoo.org/glsa/201903-05 Third Party Advisory
- https://twitter.com/thatcks/status/1076166645708668928 Patch, Third Party Advisory
- https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html cert-portal.siemens.com