Vulnerability Monitor

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CVE-2021-37706

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.

Published

2021-12-22T18:15:07.487

Last Modified

2024-11-21T06:15:45.227

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.3 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

8.6

Impact Score

10.0

Weaknesses
  • Type: Secondary
    CWE-191
  • Type: Primary
    CWE-191
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application teluu pjsip ≤ 2.11.1 Yes
Application asterisk certified_asterisk < 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application asterisk certified_asterisk 16.8.0 Yes
Application sangoma asterisk < 16.24.1 Yes
Application sangoma asterisk < 18.10.1 Yes
Application sangoma asterisk < 19.2.1 Yes
Operating System debian debian_linux 9.0 Yes
Operating System debian debian_linux 10.0 Yes
References