CVE-2020-21048

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/CVE-2020-21048
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-21048.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2020-21048
Downstream
Published
2021-09-14T16:15:08Z
Modified
2025-10-15T12:07:58.049974Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file.

References

Affected packages

Git / github.com/saitoha/libsixel

Affected ranges

Type
GIT
Repo
https://github.com/saitoha/libsixel
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
686d234ae20f97b9d816d4147ba3f4b90dbae72e
Fixed
cb373ab6614c910407c5e5a93ab935144e62b037

Affected versions

v0.*

v0.11.0
v0.12.0
v0.14.0
v0.15.0
v0.16.0
v0.16.1
v0.17.0
v0.17.1
v0.17.2
v0.18.0
v0.19.0
v0.19.1
v0.19.2
v0.19.3
v0.19.4
v0.19.5
v0.19.6
v0.20.0
v0.21.0
v0.21.1
v0.22.0
v0.22.1
v0.22.2
v0.22.3
v0.23.0
v0.23.1
v0.23.2
v0.24.0
v0.24.2
v0.25.0
v0.25.1
v0.25.2
v0.25.3
v0.25.4
v0.25.5
v0.26.0
v0.27.0
v0.27.1
v0.28.0

v1.*

v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.1.0
v1.1.1
v1.1.2
v1.1.3
v1.1.4
v1.1.5
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.4.0
v1.4.1
v1.4.10
v1.4.11
v1.4.12
v1.4.13
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.4.8
v1.4.9
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.6.0
v1.6.1
v1.7.0
v1.7.1
v1.7.2
v1.7.3
v1.8.0
v1.8.1
v1.8.2
v1.8.3

Database specific

vanir_signatures

[
    {
        "id": "CVE-2020-21048-3f5e5c8e",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "target": {
            "file": "src/dither.c",
            "function": "sixel_dither_new"
        },
        "digest": {
            "function_hash": "219832859337229444931238207892599109504",
            "length": 1607.0
        },
        "source": "https://github.com/saitoha/libsixel/commit/cb373ab6614c910407c5e5a93ab935144e62b037"
    },
    {
        "id": "CVE-2020-21048-b2b72c87",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "target": {
            "file": "src/dither.c"
        },
        "digest": {
            "line_hashes": [
                "199361631072483740361989714307393008478",
                "291343961692008382086549080687427033920",
                "16784547706756229315325119660300077615",
                "101018793880447773360178885930836492685",
                "69736891406652933996193619171756760618",
                "254643536321277286518119263644437622942",
                "115812485349409838505546949009351511461"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/saitoha/libsixel/commit/cb373ab6614c910407c5e5a93ab935144e62b037"
    }
]