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).
Published 2018-12-26 18:29:00
Updated 2021-11-30 19:52:04
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Denial of service

Exploit prediction scoring system (EPSS) score for CVE-2018-20482

Probability of exploitation activity in the next 30 days: 0.04%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2018-20482

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
1.9
LOW AV:L/AC:M/Au:N/C:N/I:N/A:P
3.4
2.9
NIST
4.7
MEDIUM CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
1.0
3.6
NIST

CWE ids for CVE-2018-20482

References for CVE-2018-20482

Products affected by CVE-2018-20482

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