CVE-2018-15862

Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file with invalid virtual modifiers.

References

Affected packages

Git / github.com/xkbcommon/libxkbcommon

Affected ranges

Type: GIT
Repo: https://github.com/xkbcommon/libxkbcommon
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371

Affected versions

xkbcommon-0.*

xkbcommon-0.2.0

xkbcommon-0.3.0

xkbcommon-0.3.1

xkbcommon-0.3.2

xkbcommon-0.4.0

xkbcommon-0.4.1

xkbcommon-0.4.2

xkbcommon-0.4.3

xkbcommon-0.5.0

xkbcommon-0.6.0

xkbcommon-0.6.1

xkbcommon-0.7.0

xkbcommon-0.7.1

xkbcommon-0.7.2

xkbcommon-0.8.0

xkbcommon-0.8.1

Database specific

vanir_signatures

[
    {
        "signature_type": "Line",
        "id": "CVE-2018-15862-1f756a73",
        "source": "https://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371",
        "signature_version": "v1",
        "target": {
            "file": "src/xkbcomp/expr.c"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "207605293108385811256869450954427532205",
                "161757858347502194683398663803400346794",
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                "70812620858281766667010722060269493189"
            ]
        },
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "id": "CVE-2018-15862-8e347297",
        "source": "https://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371",
        "signature_version": "v1",
        "target": {
            "function": "LookupModMask",
            "file": "src/xkbcomp/expr.c"
        },
        "digest": {
            "function_hash": "246470118387212733721000661341588445321",
            "length": 576.0
        },
        "deprecated": false
    }
]