UBUNTU-CVE-2017-13720

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    UBUNTU-CVE-2017-13720

    Published: 5 Oct 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-13720
    Aliases:
    USN-3442-1

    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: https://ubuntu.com/security/CVE-2017-13720, https://ubuntu.com/security/notices/USN-3442-1, https://www.cve.org/CVERecord?id=CVE-2017-13720

    Affected packages

    Package

    Name: libxfont

    Purl: pkg:deb/ubuntu/libxfont@1:1.4.7-1ubuntu0.3?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:1.4.7-1ubuntu0.3

    Affected versions

    1:1.4.6-1
    1:1.4.6-1ubuntu1
    1:1.4.7-1
    1:1.4.7-1ubuntu0.1
    1:1.4.7-1ubuntu0.2

    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
    UBUNTU-CVE-2017-13720 | CVE-DB