CVE-2021-28676

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-28676
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28676.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-28676
Aliases
Downstream
Related
Published
2021-06-02T16:15:08Z
Modified
2025-10-21T06:05:12.891330Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in Pillow before 8.2.0. For FLI data, FliDecode did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load.

References

Affected packages

Git / github.com/python-pillow/pillow

Affected ranges

Type
GIT
Repo
https://github.com/python-pillow/pillow
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
bb6c11fb889e6c11b0ee122b828132ee763b5856

Affected versions

1.*

1.0
1.2
1.7.6
1.7.7
1.7.8

2.*

2.0.0
2.1.0
2.2.0
2.2.1
2.2.2
2.3.0
2.5.0
2.6.0
2.6.0-rc1
2.7.0
2.8.0
2.8.1
2.9.0
2.9.0.dev0
2.9.0.dev1
2.9.0.dev2

3.*

3.0.0
3.1.0
3.1.0-rc1
3.2.0
3.3.0
3.3.1
3.4.0

4.*

4.0.0
4.0.0a
4.1.0
4.2.0
4.3.0

5.*

5.0.0
5.1.0
5.2.0
5.3.0
5.4.0

6.*

6.0.0
6.1.0
6.2.0

7.*

7.0.0
7.1.0
7.2.0

8.*

8.0.0
8.1.0

Database specific

vanir_signatures

[
    {
        "source": "https://github.com/python-pillow/pillow/commit/bb6c11fb889e6c11b0ee122b828132ee763b5856",
        "target": {
            "file": "src/libImaging/FliDecode.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "276082854084581862752233006547183163125",
                "154487951280376738261317199800104056040",
                "196791183223561229908953348714930460735",
                "108716279980050847017816890668636521998"
            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "id": "CVE-2021-28676-0f8c3b10"
    },
    {
        "source": "https://github.com/python-pillow/pillow/commit/bb6c11fb889e6c11b0ee122b828132ee763b5856",
        "target": {
            "function": "ImagingFliDecode",
            "file": "src/libImaging/FliDecode.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "function_hash": "90249710371010666261709649153104395496",
            "length": 3966.0
        },
        "signature_type": "Function",
        "id": "CVE-2021-28676-89bdf835"
    }
]