Medium severity · published Jan 29, 2021
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
6.5
CVSS
1.9%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Asterisk · Digium
before 13.38.0; 14.0 before 16.15.0; 17.0 before 17.9.0; 18.0 before 18.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35652
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-35652
Vendor Advisory
https://downloads.asterisk.org/pub/security/AST-2020-003.html
Vendor Advisory
https://downloads.asterisk.org/pub/security/AST-2020-004.html
Exploit
https://issues.asterisk.org/jira/browse/ASTERISK-29191
Vendor Advisory
https://issues.asterisk.org/jira/browse/ASTERISK-29219
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