CVE-2017-13720

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    CVE-2017-13720

    Published: 11 Oct 2017Last Modified: 8 Jul 2026

    Summary:

    Details: In the PatternMatch function in fontfile/fontdir.c in libXfont through 1.5.2 and 2.x before 2.0.2, an attacker with access to an X connection can cause a buffer over-read during pattern matching of fonts, leading to information disclosure or a crash (denial of service). This occurs because '\0' characters are incorrectly skipped in situations involving ? characters.

    References: http://www.debian.org/security/2017/dsa-3995, https://security.gentoo.org/glsa/201711-08, https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2, https://bugzilla.redhat.com/show_bug.cgi?id=1500690, https://bugzilla.suse.com/show_bug.cgi?id=1054285, https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    libXfont-1.5.2
    libXfont-1.5.1
    libXfont-1.5.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High