Vulnerability Monitor

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CVE-2020-35652

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from digium organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-01-29T08:15:10.520

Last Modified

2024-11-21T05:27:45.820

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: SINGLE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.0

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	digium	asterisk	< 13.38.0	Yes
Application	digium	asterisk	< 16.15.0	Yes
Application	digium	asterisk	< 17.9.0	Yes
Application	digium	asterisk	< 18.1.0	Yes

References

https://downloads.asterisk.org/pub/security/AST-2020-003.html Vendor Advisory ([email protected])
https://downloads.asterisk.org/pub/security/AST-2020-004.html Vendor Advisory ([email protected])
https://issues.asterisk.org/jira/browse/ASTERISK-29191 Exploit, Vendor Advisory ([email protected])
https://issues.asterisk.org/jira/browse/ASTERISK-29219 Vendor Advisory ([email protected])
https://downloads.asterisk.org/pub/security/AST-2020-003.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://downloads.asterisk.org/pub/security/AST-2020-004.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://issues.asterisk.org/jira/browse/ASTERISK-29191 Exploit, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://issues.asterisk.org/jira/browse/ASTERISK-29219 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For digium's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.