CVE-2021-37706

Summary

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 Software

VendorProductVersion RangeStatus
pjsippjproject<= 2.11.1affected

Weaknesses

  • CWE-191: CWE-191: Integer Underflow (Wrap or Wraparound)

ADP Enrichment

CVE Program Container

Additional References

References