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CVE-2020-35652

MEDIUM
6.5
CVSS Score
Published: January 29, 2021 at 07:22 AM UTC
Updated: June 17, 2026 at 03:14 AM UTC
1 product affected across 1 vendorAsterisk

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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Asterisk· Digium
95%
v < 13.38.014.0 ≤ v < 16.15.017.0 ≤ v < 17.9.018.0 ≤ v < 18.1.0
Affected range stops below 13.38.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.15.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.9.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 18.1.0, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://downloads.asterisk.org/pub/security/AST-2020-003.html
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://downloads.asterisk.org/pub/security/AST-2020-004.html
x_refsource_MISCExploitVendor Advisory
Source: [email protected]
https://issues.asterisk.org/jira/browse/ASTERISK-29191
x_refsource_MISCVendor Advisory
Source: [email protected]
https://issues.asterisk.org/jira/browse/ASTERISK-29219

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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