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CVE
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CVE-2021-31878Date: (C)2021-08-02   (M)2023-12-22


An issue was discovered in PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 6.5CVSS Score : 4.0
Exploit Score: 2.8Exploit Score: 8.0
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: SINGLE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: PARTIAL
Integrity: NONE 
Availability: HIGH 
  
Reference:
http://seclists.org/fulldisclosure/2021/Jul/48
http://downloads.asterisk.org/pub/security/AST-2021-007.html
http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html
https://downloads.digium.com/pub/security/AST-2021-007.html
https://issues.asterisk.org/jira/browse/ASTERISK-29381

CWE    1
CWE-617

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