CVE-2021-31566

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-31566
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-31566.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-31566
Downstream
Related
Published
2022-08-23T16:15:09Z
Modified
2025-10-15T12:59:23.209178Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

An improper link resolution flaw can occur while extracting an archive leading to changing modes, times, access control lists, and flags of a file outside of the archive. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to gain more privileges in a system.

References

Affected packages

Git / github.com/libarchive/libarchive

Affected ranges

Type
GIT
Repo
https://github.com/libarchive/libarchive
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b41daecb5ccb4c8e3b2c53fd6147109fc12c3043

Affected versions

v2.*

v2.6.0
v2.6.1
v2.6.2
v2.7.0
v2.7.1
v2.8.0
v2.8.1
v2.8.2
v2.8.3
v2.8.4
v2.8.5

v3.*

v3.0.0a
v3.0.1b
v3.0.2
v3.0.3
v3.0.4
v3.1.0
v3.1.1
v3.1.2
v3.1.900a
v3.1.901a
v3.2.0
v3.2.1
v3.2.2
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.4.0
v3.4.1
v3.4.2
v3.4.3
v3.5.0
v3.5.1

Database specific

vanir_signatures

[
    {
        "signature_type": "Function",
        "id": "CVE-2021-31566-0834228a",
        "source": "https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043",
        "signature_version": "v1",
        "target": {
            "function": "new_fixup",
            "file": "libarchive/archive_write_disk_posix.c"
        },
        "digest": {
            "function_hash": "320885234252780684570698584660020445109",
            "length": 392.0
        },
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "id": "CVE-2021-31566-ac5c5a7f",
        "source": "https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043",
        "signature_version": "v1",
        "target": {
            "function": "_archive_write_disk_close",
            "file": "libarchive/archive_write_disk_posix.c"
        },
        "digest": {
            "function_hash": "110734215287798123614942951414182550419",
            "length": 1519.0
        },
        "deprecated": false
    },
    {
        "signature_type": "Line",
        "id": "CVE-2021-31566-d6100c6d",
        "source": "https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043",
        "signature_version": "v1",
        "target": {
            "file": "libarchive/archive_write_disk_posix.c"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "334213001812460528018391827159886250604",
                "298298676331893685508912404895218376082",
                "281934148289165203262543037398505981918",
                "133516452297774702506059862221571155387",
                "255221266610567971253350916651381886473",
                "170682487718179720080081239390752149260",
                "170025671853692686754571705056591065980",
                "45037131218959646499624916514381153602",
                "186193754164664539686045318506423310731",
                "225543418414766849505237414068380309124",
                "86909181518846551630439248081499842741",
                "204079521770618757456484582354817443455",
                "186196365260791091821237758044867926710",
                "177454630852752040839969091402436254366",
                "19420843327646963772774605998605845839",
                "293067094968881452369372668079840711572",
                "203792904399839432760890263818080987312",
                "5073500280348788259073985801637204843",
                "56277685507538684435295851773380652368",
                "144927451397420683091458932258143307900"
            ]
        },
        "deprecated": false
    }
]