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AUSCERT External Security Bulletin Redistribution
ESB-2020.1759
[DLA 2214-1] libexif security update
18 May 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libexif
Publisher: Debian
Operating System: Debian GNU/Linux 8
Impact/Access: Increased Privileges -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-12767 CVE-2020-0093 CVE-2018-20030
CVE-2017-7544 CVE-2016-6328
Reference: ESB-2020.1683
ESB-2020.1591
ESB-2020.0718
ESB-2020.0680
ESB-2020.0481
Original Bulletin:
https://www.debian.org/lts/security/2020/dla-2214
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[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
mike gabriel aka sunweaver (Debian Developer)
fon: +49 (1520) 1976 148
GnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31
mail: sunweaver@debian.org, http://sunweavers.net
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