CVE-2021-41072

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Source
https://cve.org/CVERecord?id=CVE-2021-41072
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41072.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-41072
Downstream
Related
Published
2021-09-14T01:15:07.747Z
Modified
2026-07-09T05:45:02.685462Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H CVSS Calculator
Summary
[none]
Details

squashfs_opendir in unsquash-2.c in Squashfs-Tools 4.5 allows Directory Traversal, a different vulnerability than CVE-2021-40153. A squashfs filesystem that has been crafted to include a symbolic link and then contents under the same filename in a filesystem can cause unsquashfs to first create the symbolic link pointing outside the expected directory, and then the subsequent write operation will cause the unsquashfs process to write through the symbolic link elsewhere in the filesystem.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                },
                {
                    "introduced": "10.0"
                },
                {
                    "last_affected": "10.0"
                },
                {
                    "introduced": "11.0"
                },
                {
                    "last_affected": "11.0"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/plougher/squashfs-tools

Affected ranges

Type
GIT
Repo
https://github.com/plougher/squashfs-tools
Events
Introduced
0496d7c3de3e09da37ba492081c86159806ebb07
Last affected
0496d7c3de3e09da37ba492081c86159806ebb07
Fixed
e0485802ec72996c20026da320650d8362f555bd
Database specific 
{
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "4.5"
        },
        {
            "last_affected": "4.5"
        }
    ],
    "cpe": "cpe:2.3:a:squashfs-tools_project:squashfs-tools:4.5:*:*:*:*:*:*:*"
}

Affected versions

4.*
4.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41072.json"
vanir_signatures 
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        "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
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            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "squashfs-tools/unsquash-4.c"
        },
        "id": "CVE-2021-41072-17bef277"
    },
    {
        "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
        "digest": {
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        },
        "signature_type": "Function",
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        "deprecated": false,
        "target": {
            "function": "squashfs_opendir",
            "file": "squashfs-tools/unsquash-2.c"
        },
        "id": "CVE-2021-41072-17d236ac"
    },
    {
        "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
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        "deprecated": false,
        "target": {
            "function": "read_super_2",
            "file": "squashfs-tools/unsquash-2.c"
        },
        "id": "CVE-2021-41072-517a38af"
    },
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        },
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        "deprecated": false,
        "target": {
            "function": "squashfs_opendir",
            "file": "squashfs-tools/unsquash-1.c"
        },
        "id": "CVE-2021-41072-8756ee07"
    },
    {
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        "signature_version": "v1",
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        "target": {
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        },
        "id": "CVE-2021-41072-930e8cbd"
    },
    {
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        "digest": {
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        "deprecated": false,
        "target": {
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            "file": "squashfs-tools/unsquash-3.c"
        },
        "id": "CVE-2021-41072-a593c95f"
    },
    {
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        "digest": {
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        "signature_type": "Line",
        "signature_version": "v1",
        "deprecated": false,
        "target": {
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        },
        "id": "CVE-2021-41072-bde9ce70"
    },
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        "signature_type": "Function",
        "signature_version": "v1",
        "deprecated": false,
        "target": {
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            "file": "squashfs-tools/unsquash-4.c"
        },
        "id": "CVE-2021-41072-c792fca3"
    },
    {
        "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
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        "signature_version": "v1",
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        "target": {
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        },
        "id": "CVE-2021-41072-e1b69ee7"
    },
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        },
        "id": "CVE-2021-41072-e8094c28"
    }
]
vanir_signatures_modified 
"2026-07-09T05:45:02Z"