CVE-2018-13346

Publication date 6 July 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The mpatch_apply function in mpatch.c in Mercurial before 4.6.1 incorrectly proceeds in cases where the fragment start is past the end of the original data, aka OVE-20180430-0004.

From the Ubuntu Security Team

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

Status

Show unmaintained releases

Package	Ubuntu Release	Status
mercurial	18.10 cosmic	Not affected
	18.04 LTS bionic	Fixed 4.5.3-1ubuntu2.1
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Fixed 3.7.3-1ubuntu1.1
	14.04 LTS trusty	Fixed 2.8.2-1ubuntu1.4

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	High
Availability impact	None

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

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