CVE-2020-35776 - Vulnerability Details - OpenCVE

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.

Published: 2021-02-18

Score: 6.5 Medium

EPSS: 3.9% Low

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:digium:asterisk::::::::
	cpe:2.3:a:digium:asterisk::::::::
	cpe:2.3:a:digium:asterisk::::::::
	cpe:2.3:a:digium:asterisk::::::::

No data.

No data available yet.

Remediation

No remediation available yet.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2020-23431	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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.03914.

Key SSVC decision points have not yet been added.

References

Link	Providers
http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.html
http://seclists.org/fulldisclosure/2021/Feb/57
https://downloads.asterisk.org/pub/security/AST-2021-001.html
https://issues.asterisk.org/
https://issues.asterisk.org/jira/browse/ASTERISK-29227

History

No history.

Subscriptions

Digium Asterisk

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-02-18T19:57:57.000Z

Updated: 2024-08-04T17:09:15.196Z

Reserved: 2020-12-29T00:00:00.000Z

Link: CVE-2020-35776

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-02-18T20:15:12.447

Modified: 2026-06-17T03:14:16.453

Link: CVE-2020-35776

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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