SB2020060377 - Fedora 31 update for libexif

Description

This security bulletin contains information about 6 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2017-7544)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to improper length computation of the allocated data of an ExifMnote entry within the exif_data_save_data_entry() function in libexif/exif-data.c. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

2) Integer overflow (CVE-ID: CVE-2019-9278)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

3) Division by zero (CVE-ID: CVE-2020-12767)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to division by zero error in "exif_entry_get_value" in the "exif-entry.c" file. A local user can cause a denial of service condition on the target system.

4) Out-of-bounds read (CVE-ID: CVE-2020-13112)

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in EXIF MakerNote handling. A remote attacker can trigger out-of-bounds read error and read contents of memory on the system or cause a denial of service condition.

5) NULL pointer dereference (CVE-ID: CVE-2020-13113)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in EXIF Makernote handling. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

6) Buffer overflow (CVE-ID: CVE-2020-13114)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when handling Canon EXIF MakerNote data. A remote attacker can send a specially crafted file, trigger memory corruption and cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2020-085150ac6e