(RHSA-2020:4040) Moderate: libexif security, bug fix, and enhancement update

The libexif packages provide a library for extracting extra information from image files.

The following packages have been upgraded to a later upstream version: libexif (0.6.22). (BZ#1841316)

Security Fix(es):

• libexif: out of bound write in exif-data.c (CVE-2019-9278)

• libexif: out of bounds read due to a missing bounds check in exif_data_save_data_entry function in exif-data.c (CVE-2020-0093)

• libexif: use of uninitialized memory in EXIF Makernote handling can lead to crashes and use-after-free (CVE-2020-13113)

• libexif: unrestricted size in handling Canon EXIF MakerNote data can lead to consumption of large amounts of compute time (CVE-2020-13114)

• libexif: out of bounds read due to a missing bounds check in exif_entry_get_value function in exif-entry.c (CVE-2020-0182)

• libexif: divide-by-zero in exif_entry_get_value function in exif-entry.c (CVE-2020-12767)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.