Denial of Service and Information Disclosure via heap buffer overflow in FTXT encoder

Summary

ImageMagick before 7.1.2-19 contains a heap buffer overflow vulnerability in the FTXT encoder due to missing boundary checks when parsing ftxt:format. Remote attackers can trigger an out of bounds read by crafting malicious FTXT image files to cause denial of service or information disclosure. A remote attacker could exploit this using a specially crafted FTXT image to cause a denial of service or disclose sensitive information. This low-impact heap buffer overflow in ImageMagick's FTXT encoder, caused by insufficient boundary checks, could lead to denial of service or information disclosure if a user opens a specially crafted FTXT file. Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE.