medium4.7
CVE-2018-20482
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…
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Gnu | Tar | through 1.30 |
| Debian | Debian Linux | Versions 8.0, 9.0 |
| Opensuse | Leap | Version 15.0 |
Weakness classification
References
- NVD record
- CVE.org record
- 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
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html