CVE-2018-20482 Detail

Current 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).


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  4.7 MEDIUM
Vector:  CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

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://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  

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-20482
NVD Published Date:
12/26/2018
NVD Last Modified:
10/02/2019
Source:
MITRE