Vulnerability Report

CVE-2021-3899

RCE

Title: Canonical Apport RCE

RCE

Proof Of Concept

PoC Available for CVE-2021-3899

CWE Category CWE-367
Published Date Jun 03, 2024
Modified Date Aug 26, 2025
Exploit Status Available
Score 7.8 CVSS v3.1
Exploit Probability (EPSS)
0.38%

Vulnerability Summary

CVE-2021-3899: There is a race condition in the 'replaced executable' detection that, with the correct local configuration, allow an attacker to execute arbitrary code as root.

Impacted Vendors

C
canonical 1
A
apport 1

Reference Links

https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1948376 https://ubuntu.com/security/notices/USN-5427-1 https://www.cve.org/CVERecord?id=CVE-2021-3899 https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1948376 https://ubuntu.com/security/notices/USN-5427-1 https://www.cve.org/CVERecord?id=CVE-2021-3899
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-3899 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/liumuqing/CVE-2021-3899_PoC
View Code
MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.