CVE-2018-6198

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Source
https://nvd.nist.gov/vuln/detail/CVE-2018-6198
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-6198.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-6198
Downstream
Related
Published
2018-01-25T03:29:00Z
Modified
2025-10-15T09:58:14.141728Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

w3m through 0.5.3 does not properly handle temporary files when the ~/.w3m directory is unwritable, which allows a local attacker to craft a symlink attack to overwrite arbitrary files.

References

Affected packages

Git / github.com/tats/w3m

Affected ranges

Type
GIT
Repo
https://github.com/tats/w3m
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
18dcbadf2771cdb0c18509b14e4e73505b242753

Affected versions

upstream/0.*

upstream/0.1.10+0.1.11pre+kokb23
upstream/0.3
upstream/0.5.1
upstream/0.5.2
upstream/0.5.3

v0.*

v0.5.3+debian-19
v0.5.3+git20150203
v0.5.3+git20150509
v0.5.3+git20150623
v0.5.3+git20150720
v0.5.3+git20150811
v0.5.3+git20151010
v0.5.3+git20151119
v0.5.3+git20160228
v0.5.3+git20160511
v0.5.3+git20160718
v0.5.3+git20161009
v0.5.3+git20161031
v0.5.3+git20161120
v0.5.3+git20170102

Database specific

vanir_signatures

[
    {
        "id": "CVE-2018-6198-021bacd2",
        "signature_type": "Function",
        "target": {
            "function": "w3m_exit",
            "file": "main.c"
        },
        "source": "https://github.com/tats/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753",
        "digest": {
            "length": 270.0,
            "function_hash": "299411999929596845984512423028642050106"
        },
        "signature_version": "v1",
        "deprecated": false
    },
    {
        "id": "CVE-2018-6198-0bd30630",
        "signature_type": "Line",
        "target": {
            "file": "rc.c"
        },
        "source": "https://github.com/tats/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753",
        "digest": {
            "line_hashes": [
                "261335769205805046566342251010716909920",
                "29612917787393137325208173903425113215",
                "42696203700645889651420809097333495824",
                "158834774318496427167418388532438585199"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false
    },
    {
        "id": "CVE-2018-6198-48c324d5",
        "signature_type": "Function",
        "target": {
            "function": "init_rc",
            "file": "rc.c"
        },
        "source": "https://github.com/tats/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753",
        "digest": {
            "length": 1470.0,
            "function_hash": "161548505075626386636758859966345807316"
        },
        "signature_version": "v1",
        "deprecated": false
    },
    {
        "id": "CVE-2018-6198-827e47c9",
        "signature_type": "Line",
        "target": {
            "file": "main.c"
        },
        "source": "https://github.com/tats/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753",
        "digest": {
            "line_hashes": [
                "132494528490069998977071967010022007597",
                "82022512250580956341022367886085022917",
                "332768501774124119740089642761057973044",
                "294366503126602925986443129707894292652"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false
    }
]