CVE-2020-18768

libtiff: heap-based buffer overflow in _TIFFmemcpy() in tif_unix.c

Loading…

Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · March 20, 2019

Updated · November 21, 2025

Description

A heap-based buffer overflow exists in libtiff in TIFFmemcpy. This flaw allows an attacker to craft a specific TIFF file, possibly causing a denial of service that results in a loss of the system’s availability.

Statement

Red Hat has determined that this vulnerability is of low impact as successful exploitation relies on convincing a user to manually open a malicious file with tiffcp and bypassing security mechanisms such ASLR.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-122 · Heap-based Buffer Overflow