RHSA-2020:4040 - Security Advisory

Topic

An update for libexif is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 1789031 - CVE-2019-9278 libexif: out of bound write in exif-data.c
• BZ - 1834950 - CVE-2020-12767 libexif: divide-by-zero in exif_entry_get_value function in exif-entry.c
• BZ - 1840347 - CVE-2020-13113 libexif: use of uninitialized memory in EXIF Makernote handling can lead to crashes and use-after-free
• BZ - 1840350 - CVE-2020-13114 libexif: unrestricted size in handling Canon EXIF MakerNote data can lead to consumption of large amounts of compute time
• BZ - 1841316 - Rebase to libexif 0.6.22
• BZ - 1852487 - CVE-2020-0093 libexif: out of bounds read due to a missing bounds check in exif_data_save_data_entry function in exif-data.c
• BZ - 1852490 - CVE-2020-0182 libexif: out of bounds read due to a missing bounds check in exif_entry_get_value function in exif-entry.c

CVEs

• CVE-2019-9278
• CVE-2020-0093
• CVE-2020-0182
• CVE-2020-12767
• CVE-2020-13113
• CVE-2020-13114

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index