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CVE-2018-18557

Published: 22 October 2018

LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0beta7, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.4beta, 4.0.5, 4.0.6, 4.0.7, 4.0.8 and 4.0.9 (with JBIG enabled) decodes arbitrarily-sized JBIG into a buffer, ignoring the buffer size, which leads to a tif_jbig.c JBIGDecode out-of-bounds write.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
tiff
Launchpad, Ubuntu, Debian
upstream
Released (4.0.9+git181026-1)
trusty
Released (4.0.3-7ubuntu0.10)
xenial
Released (4.0.6-1ubuntu0.5)
bionic
Released (4.0.9-5ubuntu0.1)
cosmic
Released (4.0.9-6ubuntu0.1)
Patches:
upstream: https://gitlab.com/libtiff/libtiff/commit/681748ec2f5ce88da5f9fa6831e1653e46af8a66

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H