CVE-2020-35652

MEDIUM EPSS 77.2%

Published Jan 29, 20215y ago · Modified Jun 17, 20262w ago

6.5 CVSS 3.1

Medium

Published Jan 29, 2021 5y ago

Last Modified Jun 17, 2026 2w ago

Description

An issue was discovered in res_pjsip_diversion.c in Sangoma Asterisk before 13.38.0, 14.x through 16.x before 16.15.0, 17.x before 17.9.0, and 18.x before 18.1.0. A crash can occur when a SIP message is received with a History-Info header that contains a tel-uri, or when a SIP 181 response is received that contains a tel-uri in the Diversion header.

CVSS Details

Base Score

6.5

Exploitability

2.8

Impact

3.6

Vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

77.2% percentile

Exploit & Patch Status

Public Exploit Known

No Patch Available

Affected Products 4

Vendor	Product	Version	Range
digium	asterisk	*	<13.38.0
digium	asterisk	*	≥14.0 – <16.15.0
digium	asterisk	*	≥17.0 – <17.9.0
digium	asterisk	*	≥18.0 – <18.1.0

References 4

downloads.asterisk.org https://downloads.asterisk.org/pub/security/AST-2020-003.html

Vendor Advisory
downloads.asterisk.org https://downloads.asterisk.org/pub/security/AST-2020-004.html

Vendor Advisory
issues.asterisk.org https://issues.asterisk.org/jira/browse/ASTERISK-29191

ExploitVendor Advisory
issues.asterisk.org https://issues.asterisk.org/jira/browse/ASTERISK-29219

Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.