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CVE-2018-7186

Published: 16 February 2018

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.

From the Ubuntu Security Team

It was discovered that Leptonica incorrectly handled input arguments. An attacker could possibly use this issue to cause a denial of service or other unspecified impact.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
leptonlib
Launchpad, Ubuntu, Debian
impish Not vulnerable
(1.75.3-2)
xenial
Released (1.73-1ubuntu0.1~esm1)
Available with Ubuntu Pro
artful Ignored
(end of life)
bionic Not vulnerable
(1.75.3-2)
cosmic Not vulnerable
(1.75.3-2)
disco Not vulnerable
(1.75.3-2)
eoan Not vulnerable
(1.75.3-2)
focal Not vulnerable
(1.75.3-2)
groovy Not vulnerable
(1.75.3-2)
hirsute Not vulnerable
(1.75.3-2)
jammy Not vulnerable
(1.75.3-2)
trusty
Released (1.70.1-1ubuntu0.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H