A libexif security update has been released for Debian GNU/Linux 8 LTS to address various vulnerabilities in libexif.

DLA 2214-1: libexif security update

Package : libexif
Version : 0.6.21-2+deb8u2
CVE ID : CVE-2016-6328 CVE-2017-7544 CVE-2018-20030 CVE-2020-0093
CVE-2020-12767
Debian Bug : #960199 #918730 #876466 #873022

Various vulnerabilities have been addressed in libexif, a library to
parse EXIF metadata files.

CVE-2016-6328

An integer overflow when parsing the MNOTE entry data of the input
file had been found. This could have caused Denial-of-Service (DoS)
and Information Disclosure (disclosing some critical heap chunk
metadata, even other applications' private data).

CVE-2017-7544

libexif had been vulnerable to out-of-bounds heap read vulnerability
in exif_data_save_data_entry function in libexif/exif-data.c caused
by improper length computation of the allocated data of an ExifMnote
entry which could have caused denial-of-service or possibly information
disclosure.

CVE-2018-20030

An error when processing the EXIF_IFD_INTEROPERABILITY and
EXIF_IFD_EXIF tags within libexif version could have been exploited
to exhaust available CPU resources.

CVE-2020-0093

In exif_data_save_data_entry of exif-data.c, there was a possible out
of bounds read due to a missing bounds check. This could have lead to
local information disclosure with no additional execution privileges
needed. User interaction was needed for exploitation.

CVE-2020-12767

libexif had a divide-by-zero error in exif_entry_get_value in
exif-entry.c

For Debian 8 "Jessie", these problems have been fixed in version
0.6.21-2+deb8u2.

We recommend that you upgrade your libexif packages.

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