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CVE-2018-20482 Detail

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).


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
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 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

12 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-20482
NVD Published Date:
12/26/2018
NVD Last Modified:
11/30/2021
Source:
MITRE