Division by zero in GIFLIB - CVE-2019-15133

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Main Vulnerability Database Vulnerabilities #VU30817

Division by zero in GIFLIB - CVE-2019-15133

Published: August 17, 2019 / Updated: July 17, 2020


Vulnerability identifier: #VU30817
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-15133
CWE-ID: CWE-369
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: GIFLIB Project
Affected software:
GIFLIB

Detailed vulnerability description

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

In GIFLIB before 2019-02-16, a malformed GIF file triggers a divide-by-zero exception in the decoder function DGifSlurp in dgif_lib.c if the height field of the ImageSize data structure is equal to zero.


How to mitigate CVE-2019-15133

Install update from vendor's website.

Sources