CVE-2020-8252

libuv: buffer overflow in realpath

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.

La implementación de realpath en libuv versiones anteriores a versiones anteriores a 10.22.1, versiones anteriores a 12.18.4 y versiones anteriores a 14.9.0, usada dentro de Node.js determinó incorrectamente el tamaño del búfer, lo que puede resultar en un desbordamiento del búfer si la ruta resuelta tiene más de 256 bytes

A flaw has been found in libuv. The realpath() implementation performs an incorrect calculation when allocating a buffer, leading to a potential buffer overflow. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-28 CVE Reserved
2020-09-18 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-122: Heap-based Buffer Overflow

CAPEC

References (9)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20201009-0004	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00023.html	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6	2023-11-07
https://nodejs.org/en/blog/vulnerability/september-2020-security-releases	2023-11-07
https://security.gentoo.org/glsa/202009-15	2023-11-07
https://usn.ubuntu.com/4548-1	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-8252	2021-02-16
https://bugzilla.redhat.com/show_bug.cgi?id=1879315	2021-02-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Nodejs Search vendor "Nodejs"		Node.js Search vendor "Nodejs" for product "Node.js"				>= 10.0.0 < 10.22.1 Search vendor "Nodejs" for product "Node.js" and version " >= 10.0.0 < 10.22.1"		lts		Affected
Nodejs Search vendor "Nodejs"		Node.js Search vendor "Nodejs" for product "Node.js"				>= 12.0.0 < 12.18.4 Search vendor "Nodejs" for product "Node.js" and version " >= 12.0.0 < 12.18.4"		lts		Affected
Nodejs Search vendor "Nodejs"		Node.js Search vendor "Nodejs" for product "Node.js"				>= 14.0.0 < 14.9.0 Search vendor "Nodejs" for product "Node.js" and version " >= 14.0.0 < 14.9.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.2 Search vendor "Opensuse" for product "Leap" and version "15.2"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected