It was discovered that the original patch applied for CVE-2017-15587 in DSA-4006-1 was incomplete. Updated packages are now available to address this problem. For reference, the relevant part of the original advisory text follows.

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Debian Security Advisory DSA-4006-2                   This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.debian.org/security/                                         
November 10, 2017                     https://www.debian.org/security/faq
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Package        : mupdf
CVE ID         : CVE-2017-15587
Debian Bug     : 879055

It was discovered that the original patch applied for CVE-2017-15587
in DSA-4006-1 was incomplete. Updated packages are now available to
address this problem. For reference, the relevant part of the original
advisory text follows.

CVE-2017-15587

    Terry Chia and Jeremy Heng discovered an integer overflow that can
    cause arbitrary code execution via a crafted .pdf file.

For the oldstable distribution (jessie), this problem has been fixed
in version 1.5-1+deb8u3.

For the stable distribution (stretch), this problem have been fixed in
version 1.9a+ds1-4+deb9u2.

We recommend that you upgrade your mupdf packages.

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

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