Medium severity6.5NVD Advisory· Published Jul 30, 2021· Updated Jun 17, 2026
CVE-2021-31878
CVE-2021-31878
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8cpe:2.3:a:digium:asterisk:16.17.0:*:*:*:*:*:*:*+ 5 more
- cpe:2.3:a:digium:asterisk:16.17.0:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:16.18.0:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:16.19.0:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:18.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:18.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:18.5.0:*:*:*:*:*:*:*
- Asterisk/PJSIPdescription
Patches
Vulnerability mechanics
References
5- downloads.asterisk.org/pub/security/AST-2021-007.htmlnvdPatchVendor Advisory
- packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.htmlnvdPatchThird Party AdvisoryVDB Entry
- seclists.org/fulldisclosure/2021/Jul/48nvdMailing ListPatchThird Party Advisory
- downloads.digium.com/pub/security/AST-2021-007.htmlnvdPatchVendor Advisory
- issues.asterisk.org/jira/browse/ASTERISK-29381nvdExploitIssue TrackingVendor Advisory
News mentions
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