NetSight
IP …
high7.3

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,…

Impact

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.

Affected products

VendorProductAffected versions
TeluuPjsip
through 2.11.1
AsteriskCertified Asterisk
before 16.8.0
Version 16.8.0
SangomaAsterisk
from 16.0.0 before 16.24.1
from 18.0.0 before 18.10.1
from 19.0.0 before 19.2.1
DebianDebian Linux
Versions 9.0, 10.0

Weakness classification

CWE-191

References