CVE-2018-7186 Information

Description

Leptonica before 1.75.3 does not limit the number of characters in a s format argument to fscanf or sscanf which allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a long string as demonstrated by the gplotRead and ptaReadStream functions.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://bugs.debian.org/890548 https://github.com/DanBloomberg/leptonica/commit/ee301cb2029db8a6289c5295daa42bba7715e99a https://lists.debian.org/debian-lts/2018/02/msg00054.html https://lists.debian.org/debian-lts-announce/2018/03/msg00005.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8