Medium severity6.5NVD Advisory· Published Feb 18, 2021· Updated Jun 17, 2026

CVE-2020-35776

Description

A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remote attacker to crash Asterisk by deliberately misusing SIP 181 responses.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Digium/Asterisk
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
Range: >=13.0.0,<=13.38.1
Sangoma/Asteriskdescription
Freepbx/Asteriskllm-create
Range: 13.38.1, 16.15.1, 17.9.1, and 18.1.1

Patches

Vulnerability mechanics

References

packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.htmlnvdPatchThird Party Advisory
issues.asterisk.org/jira/browse/ASTERISK-29227nvdExploitIssue TrackingPatchVendor Advisory
seclists.org/fulldisclosure/2021/Feb/57nvdMailing ListThird Party Advisory
downloads.asterisk.org/pub/security/AST-2021-001.htmlnvdVendor Advisory
issues.asterisk.orgnvdIssue TrackingVendor Advisory

News mentions

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cvss	0.423
epss	0.003
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000