Division by zero in libexif - CVE-2020-12767

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Main Vulnerability Database Vulnerabilities #VU28005

Division by zero in libexif - CVE-2020-12767

Published: May 19, 2020 / Updated: June 17, 2020


Vulnerability identifier: #VU28005
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-12767
CWE-ID: CWE-369
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

libexif
Gentoo Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for ARM 64
Slackware Linux
Opensuse
Fedora
libexif (Alpine package)
libexif (Red Hat package)
libexif
IBM Tivoli Storage Manager

How to mitigate CVE-2020-12767

Install update from vendor's website.

libexif (Alpine package) - update to 0.6.22-r0
libexif (Red Hat package) - addressed in versions 0.6.22-1.el7, 0.6.22-4.el8
libexif - addressed in versions 0.6.22-1.fc31, 0.6.22-1.fc32

External References

Related Security Bulletins