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CVE-2021-31878

MEDIUM
6.5
CVSS Score
Published: July 27, 2021 at 05:17 AM UTC
Updated: June 17, 2026 at 03:52 AM UTC
1 product affected across 1 vendorAsterisk

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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (5)

x_refsource_MISCPatchVendor Advisory
Source: [email protected]
http://downloads.asterisk.org/pub/security/AST-2021-007.html
x_refsource_MISCPatchThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html
Mailing Listx_refsource_FULLDISCPatchThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2021/Jul/48
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://downloads.digium.com/pub/security/AST-2021-007.html
x_refsource_MISCExploitIssue TrackingVendor Advisory
Source: [email protected]
https://issues.asterisk.org/jira/browse/ASTERISK-29381

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-617

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