CVE-2021-37706

Published: Dic 22, 2021 Last Modified: Nov 04, 2025 EU-VD ID: EUVD-2021-24195 Aliases: GSD-2021-37706
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: low
HIGH 9,3
Source: [email protected]
Access Vector: network
Access Complexity: medium
Authentication: none
Confidentiality: complete
Integrity: complete
Availability: complete

Description

AI Translation Available

PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In affected versions if the incoming STUN message contains an ERROR-CODE attribute, the header length is not checked before performing a subtraction operation, potentially resulting in an integer underflow scenario. This issue affects all users that use STUN. A malicious actor located within the victim’s network may forge and send a specially crafted UDP (STUN) message that could remotely execute arbitrary code on the victim’s machine. Users are advised to upgrade as soon as possible. There are no known workarounds.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0024
Percentile
0,5th
Updated

EPSS Score Trend (Last 90 Days)

191

Integer Underflow (Wrap or Wraparound)

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Instability Modify Memory Execute Unauthorized Code Or Commands Bypass Protection Mechanism
Applicable Platforms
Languages: C, C#, C++, Java
View CWE Details
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert8:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version Range Affected
To 16.8.0 (exclusive)
cpe:2.3:a:asterisk:certified_asterisk:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Debian Linux by Debian

Product Information
Vendor Debian
Product Debian Linux
Version 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert5:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert6:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert3:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Asterisk by Sangoma

Product Information
Vendor Sangoma
Product Asterisk
Version Range Affected
From 19.0.0 (inclusive)
To 19.2.1 (exclusive)
cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert4:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Pjsip by Teluu

Product Information
Vendor Teluu
Product Pjsip
Version Range Affected
To 2.11.1 (inclusive)
cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert10:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert2:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert7:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Asterisk by Sangoma

Product Information
Vendor Sangoma
Product Asterisk
Version Range Affected
From 18.0.0 (inclusive)
To 18.10.1 (exclusive)
cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert12:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Asterisk by Sangoma

Product Information
Vendor Sangoma
Product Asterisk
Version Range Affected
From 16.0.0 (inclusive)
To 16.24.1 (exclusive)
cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Debian Linux by Debian

Product Information
Vendor Debian
Product Debian Linux
Version 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert1:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert11:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert9:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Certified Asterisk by Asterisk

Product Information
Vendor Asterisk
Product Certified Asterisk
Version 16.8.0
cpe:2.3:a:asterisk:certified_asterisk:16.8.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
http://packetstormsecurity.com/files/166225/Asterisk-Projec…
http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-…
http://seclists.org/fulldisclosure/2022/Mar/0
http://seclists.org/fulldisclosure/2022/Mar/0
https://github.com/pjsip/pjproject/commit/15663e3f37091069b…
https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e…
https://github.com/pjsip/pjproject/security/advisories/GHSA…
https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984
https://lists.debian.org/debian-lts-announce/2022/03/msg000…
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
https://lists.debian.org/debian-lts-announce/2022/11/msg000…
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
https://lists.debian.org/debian-lts-announce/2023/08/msg000…
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
https://lists.debian.org/debian-lts-announce/2024/09/msg000…
https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html
https://security.gentoo.org/glsa/202210-37
https://security.gentoo.org/glsa/202210-37
https://www.debian.org/security/2022/dsa-5285
https://www.debian.org/security/2022/dsa-5285
http://packetstormsecurity.com/files/166225/Asterisk-Projec…
http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-…
http://seclists.org/fulldisclosure/2022/Mar/0
http://seclists.org/fulldisclosure/2022/Mar/0
https://github.com/pjsip/pjproject/commit/15663e3f37091069b…
https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e…
https://github.com/pjsip/pjproject/security/advisories/GHSA…
https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984
https://lists.debian.org/debian-lts-announce/2022/03/msg000…
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
https://lists.debian.org/debian-lts-announce/2022/11/msg000…
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
https://lists.debian.org/debian-lts-announce/2023/08/msg000…
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
https://security.gentoo.org/glsa/202210-37
https://security.gentoo.org/glsa/202210-37
https://www.debian.org/security/2022/dsa-5285
https://www.debian.org/security/2022/dsa-5285