CVE-2018-20482

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Source
https://cve.org/CVERecord?id=CVE-2018-20482
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20482.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-20482
Downstream
Related
Published
2018-12-26T18:29:00.373Z
Modified
2026-03-20T11:24:47.120356Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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 sparsedumpregion 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).

References

Affected packages

Git / git.savannah.gnu.org/git/tar.git/

Affected ranges

Type
GIT
Repo
http://git.savannah.gnu.org/git/tar.git/
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
f8459cf8387cc2c7b3f1818a6379957fc23f5a21
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.30"
        }
    ]
}
Type
GIT
Repo
https://cgit.git.savannah.gnu.org/cgit/tar.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c15c42ccd1e2377945fd0414eca1a49294bff454

Affected versions

Other
alpha_1_13_93
alpha_1_15_90
alpha_1_15_90_incremental_1
alpha_1_15_91
old
release_1_14
release_1_15
release_1_15_1
release_1_16
release_1_16_1
release_1_17
release_1_18
release_1_19
release_1_20
release_1_21
release_1_22
release_1_23
release_1_24
release_1_25
release_1_26
release_1_27
release_1_27_1
release_1_28
release_1_29
release_1_30

Database specific

unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "8.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "9.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "15.0"
            }
        ]
    }
]
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20482.json"