CVE-2019-7307

Apport contains a TOCTTOU vulnerability when reading the users ~/.apport-ignore.xml

Severity Score

7.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Apport before versions 2.14.1-0ubuntu3.29+esm1, 2.20.1-0ubuntu2.19, 2.20.9-0ubuntu7.7, 2.20.10-0ubuntu27.1, 2.20.11-0ubuntu5 contained a TOCTTOU vulnerability when reading the users ~/.apport-ignore.xml file, which allows a local attacker to replace this file with a symlink to any other file on the system and so cause Apport to include the contents of this other file in the resulting crash report. The crash report could then be read by that user either by causing it to be uploaded and reported to Launchpad, or by leveraging some other vulnerability to read the resulting crash report, and so allow the user to read arbitrary files on the system.

Apport versiones anteriores a 2.14.1-0ubuntu3.29 + esm1, 2.20.1-0ubuntu2.19, 2.20.9-0ubuntu7.7, 2.20.10-0ubuntu27.1, 2.20.11-0ubuntu5 contenían una vulnerabilidad TOCTTOU cuando leen los usuarios el archivo ~/.apport-ignore.xml, que permite a un atacante local reemplazar este archivo con un enlace simbólico en cualquier otro archivo sobre el sistema y, por lo tanto, causar que Apport incluya el contenido de este otro archivo en el reporte del bloqueo resultante. El reporte de bloqueo podría ser leído por ese usuario provocando que sea cargado y reportado para Launchpad, o aprovechando alguna otra vulnerabilidad para leer el reporte de bloqueo resultante, y así permitir al usuario leer archivos arbitrarios en el sistema.

*Credits: Kevin Backhouse of Semmle Security Research Team

CVSS Scores

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-02-01 CVE Reserved
2019-07-09 CVE Published
2023-03-08 EPSS Updated
2024-09-16 CVE Updated
2024-09-16 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

CAPEC

References (3)

URL	Tag	Source
http://packetstormsecurity.com/files/172858/Ubuntu-Apport-Whoopsie-DoS-Integer-Overflow.html

URL	Date	SRC
https://bugs.launchpad.net/ubuntu/%2Bsource/apport/%2Bbug/1830858	2024-09-16

URL	Date	SRC

URL	Date	SRC
https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-7307.html	2023-06-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apport Project Search vendor "Apport Project"	Apport Search vendor "Apport Project" for product "Apport"	2.14.1 Search vendor "Apport Project" for product "Apport" and version "2.14.1"	-	Affected	in	Canonical Search vendor "Canonical"	Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"	14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"	esm	Safe
Apport Project Search vendor "Apport Project"	Apport Search vendor "Apport Project" for product "Apport"	2.20.1 Search vendor "Apport Project" for product "Apport" and version "2.20.1"	-	Affected	in	Canonical Search vendor "Canonical"	Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"	16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"	lts	Safe
Apport Project Search vendor "Apport Project"	Apport Search vendor "Apport Project" for product "Apport"	2.20.9 Search vendor "Apport Project" for product "Apport" and version "2.20.9"	-	Affected	in	Canonical Search vendor "Canonical"	Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"	18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"	lts	Safe
Apport Project Search vendor "Apport Project"	Apport Search vendor "Apport Project" for product "Apport"	2.20.10 Search vendor "Apport Project" for product "Apport" and version "2.20.10"	-	Affected	in	Canonical Search vendor "Canonical"	Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"	19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10"	-	Safe
Apport Project Search vendor "Apport Project"	Apport Search vendor "Apport Project" for product "Apport"	2.20.10 Search vendor "Apport Project" for product "Apport" and version "2.20.10"	-	Affected	in	Canonical Search vendor "Canonical"	Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"	19.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.04"	-	Safe