MGASA-2018-0493

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    MGASA-2018-0493

    Published: 29 Dec 2018Last Modified: 16 Apr 2026

    Summary: Updated libtiff packages fix security vulnerabilities

    Details: Heap-based buffer overflow in the cpSeparateBufToContigBuf function in tiffcp.c in LibTIFF 4.0.9 allows remote attackers to cause a denial of service (crash) or possibly have unspecified other impact via a crafted TIFF file. (CVE-2018-12900) LibTIFF 4.0.9 (with JBIG enabled) decodes arbitrarily-sized JBIG into a buffer, ignoring the buffer size, which leads to a tif_jbig.c JBIGDecode out-of-bounds write. (CVE-2018-18557) In LibTIFF 4.0.9, there is a NULL pointer dereference in the TIFFWriteDirectorySec function in tif_dirwrite.c that will lead to a denial of service attack, as demonstrated by tiffset. (CVE-2018-19210)

    References: https://advisories.mageia.org/MGASA-2018-0493.html, https://bugs.mageia.org/show_bug.cgi?id=24053, https://www.debian.org/security/2018/dsa-4349, https://lists.opensuse.org/opensuse-updates/2018-11/msg00138.html, https://lists.opensuse.org/opensuse-updates/2018-12/msg00038.html

    Affected packages

    Package

    Name: libtiff

    Purl: pkg:rpm/mageia/libtiff?arch=source&distro=mageia-6

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.0.9-1.9.mga6

    Affected versions

    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