CVE-2021-22918

libuv: out-of-bounds read in uv__idna_toascii() can lead to information disclosures or crashes

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Node.js before 16.4.1, 14.17.2, 12.22.2 is vulnerable to an out-of-bounds read when uv__idna_toascii() is used to convert strings to ASCII. The pointer p is read and increased without checking whether it is beyond pe, with the latter holding a pointer to the end of the buffer. This can lead to information disclosures or crashes. This function can be triggered via uv_getaddrinfo().

Node.js versiones anteriores a 16.4.1, 14.17.2, 12.22.2, es vulnerable a una lectura fuera de límites cuando la función uv__idna_toascii() es usada para convertir cadenas a ASCII. El puntero p es leído e incrementado sin comprobar si está más allá de pe, siendo este último un puntero al final del buffer. Esto puede conllevar a una revelación de información o el bloqueo de la misma. Esta función puede ser desencadenada por medio de la función uv_getaddrinfo()

A flaw has been found in libuv. Node.js is vulnerable to out-of-bounds read in libuv's uv__idna_toascii() function which is used to convert strings to ASCII which is called by Node's DNS module's lookup() function and can lead to information disclosures or crashes. The highest threat from this vulnerability is to system availability.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-06 CVE Reserved
2021-07-07 CVE Published
2024-03-27 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (7)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20210805-0003	Third Party Advisory

URL	Date	SRC
https://hackerone.com/reports/1209681	2024-08-03

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf	2024-01-16
https://nodejs.org/en/blog/vulnerability/july-2021-security-releases	2024-01-16

URL	Date	SRC
https://security.gentoo.org/glsa/202401-23	2024-01-16
https://access.redhat.com/security/cve/CVE-2021-22918	2021-09-22
https://bugzilla.redhat.com/show_bug.cgi?id=1979338	2021-09-22

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"				>= 12.0.0 < 12.22.2 Search vendor "Nodejs" for product "Node.js" and version " >= 12.0.0 < 12.22.2"		-		Affected
Nodejs Search vendor "Nodejs"		Node.js Search vendor "Nodejs" for product "Node.js"				>= 14.0.0 < 14.17.2 Search vendor "Nodejs" for product "Node.js" and version " >= 14.0.0 < 14.17.2"		-		Affected
Nodejs Search vendor "Nodejs"		Node.js Search vendor "Nodejs" for product "Node.js"				>= 16.0.0 < 16.4.1 Search vendor "Nodejs" for product "Node.js" and version " >= 16.0.0 < 16.4.1"		-		Affected
Siemens Search vendor "Siemens"		Sinec Infrastructure Network Services Search vendor "Siemens" for product "Sinec Infrastructure Network Services"				< 1.0.1.1 Search vendor "Siemens" for product "Sinec Infrastructure Network Services" and version " < 1.0.1.1"		-		Affected