CVE-2020-26575

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Source
https://nvd.nist.gov/vuln/detail/CVE-2020-26575
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-26575.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2020-26575
Downstream
Related
Published
2020-10-06T15:15:15Z
Modified
2025-11-10T16:09:35.299316Z
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

In Wireshark through 3.2.7, the Facebook Zero Protocol (aka FBZERO) dissector could enter an infinite loop. This was addressed in epan/dissectors/packet-fbzero.c by correcting the implementation of offset advancement.

References

Affected packages

Git / github.com/wireshark/wireshark

Affected ranges

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

Git / gitlab.com/wireshark/wireshark

Affected ranges

Type
GIT
Repo
https://gitlab.com/wireshark/wireshark
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3ff940652962c099b73ae3233322b8697b0d10ab

Affected versions

Other

backups/ethereal@18706
ethereal-0-3-15
start

ethereal-0.*

ethereal-0.3.15

v1.*

v1.11.0
v1.11.0-rc1
v1.11.1
v1.11.1-rc1
v1.11.2
v1.11.2-rc1
v1.11.3
v1.11.3-rc1
v1.11.4-rc1
v1.99.0
v1.99.0-rc1
v1.99.1
v1.99.10rc0
v1.99.1rc0
v1.99.2
v1.99.2rc0
v1.99.3
v1.99.3rc0
v1.99.4
v1.99.4rc0
v1.99.5
v1.99.5rc0
v1.99.6
v1.99.6rc0
v1.99.7
v1.99.7rc0
v1.99.8
v1.99.8rc0
v1.99.9
v1.99.9rc0

v2.*

v2.1.0
v2.1.0rc0
v2.1.1
v2.1.1rc0
v2.1.2rc0
v2.3.0rc0
v2.5.0
v2.5.0rc0
v2.5.1
v2.5.1rc0
v2.5.2rc0
v2.9.0
v2.9.0rc0
v2.9.1rc0

v3.*

v3.1.0
v3.1.0rc0
v3.1.1
v3.1.1rc0
v3.1.2rc0
v3.3.0
v3.3.0rc0
v3.3.1
v3.3.1rc0
v3.3.2rc0

wireshark-1.*

wireshark-1.11.3
wireshark-1.99.0
wireshark-1.99.1
wireshark-1.99.2
wireshark-1.99.3
wireshark-1.99.4
wireshark-1.99.5
wireshark-1.99.6
wireshark-1.99.7
wireshark-1.99.8
wireshark-1.99.9

wireshark-2.*

wireshark-2.1.0
wireshark-2.1.1
wireshark-2.5.0

Database specific

vanir_signatures

[
    {
        "id": "CVE-2020-26575-5297c41c",
        "deprecated": false,
        "source": "https://gitlab.com/wireshark/wireshark@3ff940652962c099b73ae3233322b8697b0d10ab",
        "digest": {
            "length": 5016.0,
            "function_hash": "84154261008737939902450171764549140288"
        },
        "target": {
            "function": "proto_register_fb_zero",
            "file": "epan/dissectors/packet-fbzero.c"
        },
        "signature_version": "v1",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2020-26575-a07a3ccc",
        "deprecated": false,
        "source": "https://gitlab.com/wireshark/wireshark@3ff940652962c099b73ae3233322b8697b0d10ab",
        "digest": {
            "line_hashes": [
                "277478937141174828028637895756283579410",
                "10019354092826942567024362475433115388",
                "131525010486751362225464350724994977345",
                "254780059365605332650960319914820935612",
                "201894044631323551269775482078671692288",
                "93724516377978981379597795420637442662",
                "99556750202311595969094874610977454676",
                "237055850321980614802788386596803708312",
                "95637253697329982411058909251583561328",
                "110322938865728618629951955156544462870",
                "43434634064579026997284057392357874152",
                "234337073310607543188225005935108678463",
                "48325267683462326833116598420950938179",
                "303855810784359905657086906803144814681",
                "19642233341739342455331457094249227014",
                "108539305001974887994550686192326518464",
                "167729265614314314223683620861694599210",
                "236559202629989049185175575506258726288",
                "261729958931252712675749187762528998502",
                "85746300986046817953103111515947307375"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "epan/dissectors/packet-fbzero.c"
        },
        "signature_version": "v1",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2020-26575-b80faad3",
        "deprecated": false,
        "source": "https://gitlab.com/wireshark/wireshark@3ff940652962c099b73ae3233322b8697b0d10ab",
        "digest": {
            "length": 3926.0,
            "function_hash": "250592286267834778127219217177861522819"
        },
        "target": {
            "function": "dissect_fb_zero_tag",
            "file": "epan/dissectors/packet-fbzero.c"
        },
        "signature_version": "v1",
        "signature_type": "Function"
    }
]