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Debian LTS Advisory DLA-2377-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                          Adrian Bunk
September 21, 2020                            https://wiki.debian.org/LTS
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Package        : qt4-x11
Version        : 4:4.8.7+dfsg-11+deb9u1
CVE ID         : CVE-2018-15518 CVE-2018-19869 CVE-2018-19870 CVE-2018-19871 
                 CVE-2018-19872 CVE-2018-19873 CVE-2020-17507
Debian Bug     : 923003 970308

Several vulnerabilities were fixed in qt4-x11, the legacy version
of the Qt toolkit.

CVE-2018-15518

    Double-free or corruption in QXmlStreamReader during parsing of a 
    specially crafted illegal XML document.

CVE-2018-19869

    A malformed SVG image causes a segmentation fault.

CVE-2018-19870

    A malformed GIF image causes a NULL pointer dereference in 
    QGifHandler resulting in a segmentation fault.

CVE-2018-19871

    Uncontrolled Resource Consumption in QTgaFile.

CVE-2018-19872

    A malformed PPM image causes a crash.

CVE-2018-19873

    QBmpHandler segfault on malformed BMP file.

CVE-2020-17507

    Buffer over-read in the XBM parser.

For Debian 9 stretch, these problems have been fixed in version
4:4.8.7+dfsg-11+deb9u1.

We recommend that you upgrade your qt4-x11 packages.

For the detailed security status of qt4-x11 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/qt4-x11

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS