MGASA-2020-0238 - Updated libexif packages fix security vulnerability

Publication date: 27 May 2020
URL: https://advisories.mageia.org/MGASA-2020-0238.html
Type: security
Affected Mageia releases: 7
CVE: CVE-2020-0093,
     CVE-2020-13112,
     CVE-2020-13113,
     CVE-2020-13114

The updated packages fix a security vulnerability:

In exif_data_save_data_entry of exif-data.c, there is a possible out of
bounds read due to a missing bounds check. This could lead to local
information disclosure with no additional execution privileges needed.
User interaction is needed for exploitation. (CVE-2020-0093)

exif_entry_get_value in exif-entry.c in libexif 0.6.21 has a divide-by-zero
error (CVE-2020-12767).

An issue was discovered in libexif before 0.6.22. Several buffer over-reads in
EXIF MakerNote handling could lead to information disclosure and crashes
(CVE-2020-13112).

An issue was discovered in libexif before 0.6.22. Use of uninitialized memory
in EXIF Makernote handling could lead to crashes and potential use-after-free
conditions (CVE-2020-13113).

An issue was discovered in libexif before 0.6.22. An unrestricted size in
handling Canon EXIF MakerNote data could lead to consumption of large amounts
of compute time for decoding EXIF data (CVE-2020-13114).

The libexif package has been updated to version 0.6.22, fixing these issues
and other bugs.

Also, the exif package has been updated to version 0.6.22.  See the upstream
NEWS files for details.

References:
- https://bugs.mageia.org/show_bug.cgi?id=26650
- https://www.debian.org/lts/security/2020/dla-2214
- https://github.com/libexif/libexif/blob/libexif-0_6_22-release/NEWS
- https://github.com/libexif/exif/blob/exif-0_6_22-release/NEWS
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0093
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13112
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13113
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13114

SRPMS:
- 7/core/libexif-0.6.22-1.mga7
- 7/core/exif-0.6.22-1.mga7