CVE-2021-41072

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/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
2021-09-14T01:15:07Z
Modified
2025-10-14T18:47:02.205155Z
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.

References

Affected packages

Git / github.com/plougher/squashfs-tools

Affected ranges

Type
GIT
Repo
https://github.com/plougher/squashfs-tools
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
e0485802ec72996c20026da320650d8362f555bd

Affected versions

3.*

3.1
3.2
3.2-r2

4.*

4.4
4.4-git.1
4.5

Database specific 

{
    "vanir_signatures": [
        {
            "signature_version": "v1",
            "target": {
                "file": "squashfs-tools/unsquash-4.c"
            },
            "signature_type": "Line",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "line_hashes": [
                    "13826501275751200352062856063484710912",
                    "310321498175082041215183790365799830598",
                    "222252199053251366417172446049972134779"
                ],
                "threshold": 0.9
            },
            "id": "CVE-2021-41072-17bef277"
        },
        {
            "signature_version": "v1",
            "target": {
                "function": "squashfs_opendir",
                "file": "squashfs-tools/unsquash-2.c"
            },
            "signature_type": "Function",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "length": 2732.0,
                "function_hash": "18901525040218552686384788208234690139"
            },
            "id": "CVE-2021-41072-17d236ac"
        },
        {
            "signature_version": "v1",
            "target": {
                "function": "read_super_2",
                "file": "squashfs-tools/unsquash-2.c"
            },
            "signature_type": "Function",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "length": 1204.0,
                "function_hash": "54792938322389362071123182180987984409"
            },
            "id": "CVE-2021-41072-517a38af"
        },
        {
            "signature_version": "v1",
            "target": {
                "function": "squashfs_opendir",
                "file": "squashfs-tools/unsquash-1.c"
            },
            "signature_type": "Function",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "length": 2732.0,
                "function_hash": "18901525040218552686384788208234690139"
            },
            "id": "CVE-2021-41072-8756ee07"
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "squashfs-tools/unsquashfs.h"
            },
            "signature_type": "Line",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "line_hashes": [
                    "89582843057714310302560616203867031271",
                    "49499559178388147018567964199199003077"
                ],
                "threshold": 0.9
            },
            "id": "CVE-2021-41072-930e8cbd"
        },
        {
            "signature_version": "v1",
            "target": {
                "function": "squashfs_opendir",
                "file": "squashfs-tools/unsquash-3.c"
            },
            "signature_type": "Function",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "length": 2736.0,
                "function_hash": "310221983440334615105753322885496648658"
            },
            "id": "CVE-2021-41072-a593c95f"
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "squashfs-tools/unsquash-2.c"
            },
            "signature_type": "Line",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "line_hashes": [
                    "321819792665477290116542811770824633115",
                    "153109692933111748050391633369134751289",
                    "200445461191816545489245548579996642577",
                    "109435949105249211745989750370743912367",
                    "13826501275751200352062856063484710912",
                    "310321498175082041215183790365799830598",
                    "222252199053251366417172446049972134779",
                    "48309106085847685141102099689057574146",
                    "301385753643948902204006603759959075192",
                    "126113801197783751144936314844357774461",
                    "184633766433689322390316538862612286887"
                ],
                "threshold": 0.9
            },
            "id": "CVE-2021-41072-bde9ce70"
        },
        {
            "signature_version": "v1",
            "target": {
                "function": "squashfs_opendir",
                "file": "squashfs-tools/unsquash-4.c"
            },
            "signature_type": "Function",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "length": 2502.0,
                "function_hash": "95133666285201796399228902473090162087"
            },
            "id": "CVE-2021-41072-c792fca3"
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "squashfs-tools/unsquash-3.c"
            },
            "signature_type": "Line",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "line_hashes": [
                    "13826501275751200352062856063484710912",
                    "310321498175082041215183790365799830598",
                    "222252199053251366417172446049972134779"
                ],
                "threshold": 0.9
            },
            "id": "CVE-2021-41072-e1b69ee7"
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "squashfs-tools/unsquash-1.c"
            },
            "signature_type": "Line",
            "source": "https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd",
            "deprecated": false,
            "digest": {
                "line_hashes": [
                    "13826501275751200352062856063484710912",
                    "310321498175082041215183790365799830598",
                    "222252199053251366417172446049972134779"
                ],
                "threshold": 0.9
            },
            "id": "CVE-2021-41072-e8094c28"
        }
    ]
}